Feedback window to provide early feedback for transmissions in a set of consecutive transmission time intervals

ABSTRACT

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indicator of a feedback window that is offset relative to a beginning transmission time interval (TTI) of a set of consecutive TTIs. The consecutive TTIs may include a set of aggregated slots or may correspond to a multi-TTI grant. The feedback window may include multiple control channel occasions interspersed within a duration of the set of consecutive TTIs. The UE may receive a transport block within a first TTI of the set of consecutive TTIs and transmit, within a control channel, feedback to indicate whether the transport block was successfully received.

CROSS REFERENCES

The present application for patent is a Continuation of U.S. patentapplication Ser. No. 16/425,593 by Zhang et al., entitled “FEEDBACKWINDOW TO PROVIDE EARLY FEEDBACK FOR TRANSMISSIONS IN A SET OFCONSECUTIVE TRANSMISSION TIME INTERVALS” filed May 29, 2019, whichclaims the benefit of U.S. Provisional Patent Application No. 62/680,804by Zhang et al., entitled “FEEDBACK WINDOW TO PROVIDE EARLY FEEDBACK FORTRANSMISSIONS IN A SET OF CONSECUTIVE TRANSMISSION TIME INTERVALS,”filed Jun. 5, 2018, assigned to the assignee hereof, and expresslyincorporated by reference herein.

BACKGROUND

The following relates generally to wireless communications, and morespecifically to a feedback window for providing early feedback fortransmissions in a set of consecutive transmission time intervals.

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform-spread-OFDM (DFT-S-OFDM). A wireless multiple-accesscommunications system may include a number of base stations or networkaccess nodes, each simultaneously supporting communication for multiplecommunication devices, which may be otherwise known as user equipment(UE).

A base station in some Long Term Evolution (LTE) or New Radio (NR)deployments may allocate time and frequency resources in one or moretransmission time intervals (TTIs) to a UE in which to receive adownlink transmission, to transmit an uplink transmission, or both. LTEand NR systems provide for a multi-TTI grant that may allocate resourcesin multiple consecutive TTIs to a same UE. Some NR systems provide forcommunication using slot aggregation, in which a base station may granta UE resources in a set of consecutive slots. In some cases, a sametransport block (TB) may be communicated in each slot of the multipleaggregated slots to provide a better link budget and increase thelikelihood that the TB is successfully received.

Communication reliability may be enhanced through feedback mechanismsthat may provide for retransmission of unsuccessfully receivedtransmissions, such as according to hybrid acknowledgment repeat request(HARQ) feedback techniques, for example. In HARQ, a receiver, such as aUE or base station, may attempt to decode a transmission and sendfeedback indicating whether the receiver could successfully decode thetransmission. Conventional feedback techniques may be deficient.

SUMMARY

The described techniques relate to improved methods, systems, devices,or apparatuses that support a feedback window to provide early feedbackfor transmissions using slot aggregation or multi-transmission timeinterval (multi-TTI) grants. Generally, the described techniques enablea user equipment (UE) or a base station to provide early feedbackinformation (e.g., acknowledgment (ACK) or negative acknowledgment(NACK) information) within a feedback window that includes a set ofcontrol channel occasions interspersed within a duration of a set ofconsecutive TTIs. The set of consecutive TTIs may be a set of aggregatedslots having a duration configured via radio resource control (RRC)signaling, or may correspond to a multi-TTI grant. The feedback windowmay be offset relative to a beginning TTI of the set of consecutiveTTIs. The UE or base station may use at least one of the control channeloccasions to provide early feedback on whether a transport block issuccessfully received within one of the TTIs, rather than waiting toprovide feedback until after a last TTI of the set of consecutive TTIs.Beneficially, the techniques described herein may provide forreallocation of at least a later one of the consecutive TTIs when thefeedback indicates successful receipt of a transport block in one of theearlier one of the consecutive TTIs, as well as reducing retransmissionlatency by permitting earlier retransmission of at least a portion of atransport block in a later one of the consecutive TTIs that the feedbackindicates was not successfully received in an earlier one of theconsecutive TTIs.

A method of wireless communication by a UE is described. The method mayinclude receiving an indicator of a feedback window that is offsetrelative to a beginning TTI of a set of consecutive TTIs, the feedbackwindow including a set of control channel occasions interspersed withina duration of the set of consecutive TTIs, receiving a transport blockwithin a first TTI of the set of consecutive TTIs, and transmitting,within a first control channel occasion of the set of control channeloccasions, feedback to indicate whether the transport block wassuccessfully received.

An apparatus for wireless communication by a UE is described. Theapparatus may include a processor, memory in electronic communicationwith the processor, and instructions stored in the memory. Theinstructions may be executable by the processor to cause the apparatusto receive an indicator of a feedback window that is offset relative toa beginning TTI of a set of consecutive TTIs, the feedback windowincluding a set of control channel occasions interspersed within aduration of the set of consecutive TTIs, receive a transport blockwithin a first TTI of the set of consecutive TTIs, and transmit, withina first control channel occasion of the set of control channeloccasions, feedback to indicate whether the transport block wassuccessfully received.

Another apparatus for wireless communication by a UE is described. Theapparatus may include means for receiving an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,receiving a transport block within a first TTI of the set of consecutiveTTIs, and transmitting, within a first control channel occasion of theset of control channel occasions, feedback to indicate whether thetransport block was successfully received.

A non-transitory computer-readable medium storing code for wirelesscommunication by a UE is described. The code may include instructionsexecutable by a processor to receive an indicator of a feedback windowthat is offset relative to a beginning TTI of a set of consecutive TTIs,the feedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs, receive atransport block within a first TTI of the set of consecutive TTIs, andtransmit, within a first control channel occasion of the set of controlchannel occasions, feedback to indicate whether the transport block wassuccessfully received.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining not totransmit the feedback within any subsequent control channel occasion ofthe set of control channel occasions that occur after the first controlchannel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for discontinuingmonitoring a second TTI that occurs after the first TTI for thetransport block based on the feedback including an acknowledgment.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for monitoring a second TTIof the set of consecutive TTIs that occurs after the first TTI for asecond transport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving the secondtransport block in the second TTI and transmitting, within a secondcontrol channel occasion of the set of control channel occasions thatoccurs after the first control channel occasion, an acknowledgment toindicate successful receipt of the second transport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, within asecond control channel occasion of the set of control channel occasionsthat occurs after to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the second transportblock.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a secondindicator that indicates the duration of the set of consecutive TTIs,where the set of consecutive TTIs may be a set of aggregated TTIs.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes anacknowledgment to indicate successful receipt of the transport block.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback indicateswhether a set of transport blocks including the transport block weresuccessfully received.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes anegative acknowledgment to indicate unsuccessful receipt of thetransport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting deltachannel state information within the first control channel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, within asecond control channel occasion of the set of control channel occasionsthat occurs prior to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the transport blockin a second TTI that occurs prior to the first TTI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a grantindicating the beginning TTI of the set of consecutive TTIs andallocation of resources within each TTI of the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting acapability indicator to a base station, where a time period between thegrant and the beginning TTI may be based on the capability indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for performing clearchannel assessment on a shared radio frequency spectrum band prior totransmitting the feedback within the first control channel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving the transportblock in a subset of TTIs of the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, within acontrol channel of a TTI occurring after the set of consecutive TTIs,channel state information and second feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a secondindicator that associates a respective redundancy version of a set ofredundancy versions of the transport block with a respective TTI of theset of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for monitoring for adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

A method of wireless communication by a UE is described. The method mayinclude receiving an indicator of a feedback window that is offsetrelative to a beginning TTI of a set of consecutive TTIs, the feedbackwindow including a set of control channel occasions interspersed withina duration of the set of consecutive TTIs, transmitting a transportblock within a first TTI of the set of consecutive TTIs, and receiving,within a first control channel occasion of the set of control channeloccasions, feedback indicating whether the transport block wassuccessfully received.

An apparatus for wireless communication by a UE is described. Theapparatus may include a processor, memory in electronic communicationwith the processor, and instructions stored in the memory. Theinstructions may be executable by the processor to cause the apparatusto receive an indicator of a feedback window that is offset relative toa beginning TTI of a set of consecutive TTIs, the feedback windowincluding a set of control channel occasions interspersed within aduration of the set of consecutive TTIs, transmit a transport blockwithin a first TTI of the set of consecutive TTIs, and receive, within afirst control channel occasion of the set of control channel occasions,feedback indicating whether the transport block was successfullyreceived.

Another apparatus for wireless communication by a UE is described. Theapparatus may include means for receiving an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,transmitting a transport block within a first TTI of the set ofconsecutive TTIs, and receiving, within a first control channel occasionof the set of control channel occasions, feedback indicating whether thetransport block was successfully received.

A non-transitory computer-readable medium storing code for wirelesscommunication by a UE is described. The code may include instructionsexecutable by a processor to receive an indicator of a feedback windowthat is offset relative to a beginning TTI of a set of consecutive TTIs,the feedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs, transmita transport block within a first TTI of the set of consecutive TTIs, andreceive, within a first control channel occasion of the set of controlchannel occasions, feedback indicating whether the transport block wassuccessfully received.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining not toretransmit the transport block in a subsequent TTI of the set ofconsecutive TTIs based on the feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining toretransmit, within a subsequent TTI of the consecutive set of TTIs, thetransport block based on the feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining toretransmit, within a subsequent TTI of the consecutive set of TTIs, atleast one code block or code block group of the transport block based onthe feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting thetransport block in each TTI of the set of TTIs that occurs prior to thefirst control channel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for scheduling to transmitat least two different transport blocks in the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a grantindicating the beginning TTI of the set of consecutive TTIs andallocation of resources within each TTI of the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting acapability indicator to a base station, where a time period between thegrant and the beginning TTI may be based on the capability indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a secondtransport block in a second TTI of the set of consecutive TTIs thatoccurs after the first control channel occasion based on the feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, within acontrol channel of a TTI occurring after the set of consecutive TTIs,transport block level feedback for at least one transport blocktransmitted within the set of consecutive TTIs.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes codeblock group-level feedback or code block-level feedback for thetransport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

A method of wireless communication by a base station is described. Themethod may include transmitting, to a UE, an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,receiving a transport block within a first TTI of the set of consecutiveTTIs, and transmitting, within a first control channel occasion of theset of control channel occasions, feedback indicating whether thetransport block was successfully received.

An apparatus for wireless communication by a base station is described.The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to transmit, to a UE, an indicator of a feedback window thatis offset relative to a beginning TTI of a set of consecutive TTIs, thefeedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs, receive atransport block within a first TTI of the set of consecutive TTIs, andtransmit, within a first control channel occasion of the set of controlchannel occasions, feedback indicating whether the transport block wassuccessfully received.

Another apparatus for wireless communication by a base station isdescribed. The apparatus may include means for transmitting, to a UE, anindicator of a feedback window that is offset relative to a beginningTTI of a set of consecutive TTIs, the feedback window including a set ofcontrol channel occasions interspersed within a duration of the set ofconsecutive TTIs, receiving a transport block within a first TTI of theset of consecutive TTIs, and transmitting, within a first controlchannel occasion of the set of control channel occasions, feedbackindicating whether the transport block was successfully received.

A non-transitory computer-readable medium storing code for wirelesscommunication by a base station is described. The code may includeinstructions executable by a processor to transmit, to a UE, anindicator of a feedback window that is offset relative to a beginningTTI of a set of consecutive TTIs, the feedback window including a set ofcontrol channel occasions interspersed within a duration of the set ofconsecutive TTIs, receive a transport block within a first TTI of theset of consecutive TTIs, and transmit, within a first control channeloccasion of the set of control channel occasions, feedback indicatingwhether the transport block was successfully received.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, transmitting the feedbackfurther may include operations, features, means, or instructions fortransmitting a grant that includes the feedback, where the grantindicates to terminate transmission of the transport block in at leastone TTI of the set of consecutive TTIs that occurs after the firstcontrol channel occasion.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback indicateswhether a code block or code block group of the transport block wassuccessfully received.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for attempting to decodethe transport block in each TTI of the set of TTIs that occurs prior tothe first control channel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a grantindicating the beginning TTI of the set of consecutive TTIs andallocation of resources within each TTI of the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a capabilityindicator, where a time period between transmission of the grant and thebeginning TTI may be based on the capability indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a secondtransport block in a second TTI of the set of consecutive TTIs thatoccurs after the first TTI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, within acontrol channel of a TTI occurring after the set of consecutive TTIs,transport block level feedback for at least one transport blocktransmitted within the set of consecutive TTIs.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes codeblock group-level feedback or code block-level feedback for thetransport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for monitoring for adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

A method of wireless communication by a base station is described. Themethod may include transmitting, to a UE, an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,transmitting a transport block within a first TTI of the set ofconsecutive TTIs, and receiving, within a first control channel occasionof the set of control channel occasions, feedback to indicate whetherthe transport block was successfully received.

An apparatus for wireless communication by a base station is described.The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to transmit, to a UE, an indicator of a feedback window thatis offset relative to a beginning TTI of a set of consecutive TTIs, thefeedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs, transmita transport block within a first TTI of the set of consecutive TTIs, andreceive, within a first control channel occasion of the set of controlchannel occasions, feedback to indicate whether the transport block wassuccessfully received.

Another apparatus for wireless communication by a base station isdescribed. The apparatus may include means for transmitting, to a UE, anindicator of a feedback window that is offset relative to a beginningTTI of a set of consecutive TTIs, the feedback window including a set ofcontrol channel occasions interspersed within a duration of the set ofconsecutive TTIs, transmitting a transport block within a first TTI ofthe set of consecutive TTIs, and receiving, within a first controlchannel occasion of the set of control channel occasions, feedback toindicate whether the transport block was successfully received.

A non-transitory computer-readable medium storing code for wirelesscommunication by a base station is described. The code may includeinstructions executable by a processor to transmit, to a UE, anindicator of a feedback window that is offset relative to a beginningTTI of a set of consecutive TTIs, the feedback window including a set ofcontrol channel occasions interspersed within a duration of the set ofconsecutive TTIs, transmit a transport block within a first TTI of theset of consecutive TTIs, and receive, within a first control channeloccasion of the set of control channel occasions, feedback to indicatewhether the transport block was successfully received.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a secondindicator that indicates the duration of the set of consecutive TTIs,where the set of consecutive TTIs may be a set of aggregated TTIs.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes anacknowledgment to indicate successful receipt of the transport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, to theUE, a grant indicating reallocation of at least one TTI of the set ofconsecutive TTIs that occurs after the first control channel occasion.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the feedback includes anegative acknowledgment to indicate unsuccessful receipt of thetransport block.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving delta channelstate information within the first control channel occasion.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, within asecond control channel occasion of the set of control channel occasionsthat occurs prior to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the transport blockin a second TTI that occurs prior to the first TTI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a grantindicating the beginning TTI of the set of consecutive TTIs andallocation of resources within each TTI of the set of consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a differentredundancy version of the transport block in a subset of TTIs of the setof consecutive TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a secondtransport block in a second TTI of the set of consecutive TTIs thatoccurs after the first TTI based on the feedback including anacknowledgement.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, within asecond control channel occasion of the set of control channel occasions,a second feedback to indicate whether the second transport block wassuccessfully received.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, within acontrol channel of a TTI occurring after the set of consecutive TTIs,channel state information feedback and second feedback.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a secondindicator that associates a respective redundancy version of a set ofredundancy versions of the transport block with a respective TTI of theset of TTIs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a system for wireless communications inaccordance with aspects of the present disclosure.

FIG. 2 illustrates an example diagram of a wireless communicationssystem in accordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a communication timeline in accordancewith aspects of the present disclosure.

FIG. 4 illustrates an example of a communication timeline in accordancewith aspects of the present disclosure.

FIG. 5 illustrates an example of a communication timeline in accordancewith aspects of the present disclosure.

FIG. 6 illustrates an example of a communication timeline in accordancewith aspects of the present disclosure.

FIG. 7 illustrates an example of a communication timeline in accordancewith aspects of the present disclosure.

FIG. 8 illustrates an example of a process flow in accordance withaspects of the present disclosure.

FIGS. 9 and 10 show block diagrams of devices in accordance with aspectsof the present disclosure.

FIG. 11 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 12 shows a diagram of a system including a device in accordancewith aspects of the present disclosure.

FIGS. 13 and 14 show block diagrams of devices that support a feedbackwindow for providing early feedback for transmissions in a set ofconsecutive transmission time intervals in accordance with aspects ofthe present disclosure.

FIG. 15 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 16 shows a diagram of a system including a device in accordancewith aspects of the present disclosure.

FIGS. 17 through 20 show flowcharts illustrating methods in accordancewith aspects of the present disclosure.

DETAILED DESCRIPTION

The described techniques relate to improved methods, systems, devices,or apparatuses that support early feedback within a duration of amulti-transmission time interval (multi-TTI) grant or within a durationof a set of aggregated slots. Generally, the described techniques enablea user equipment (UE) or a base station to provide early feedbackinformation (e.g., acknowledgement/negative acknowledgement (ACK/NACK)information) within a feedback window that includes a set of controlchannel occasions that are interspersed within a duration of a set ofconsecutive TTIs. The set of consecutive TTIs may be a set of aggregatedslots or may correspond to a multi-TTI grant. The feedback window may beoffset relative to a beginning TTI of the set of consecutive TTIs. TheUE or base station may use at least one of the control channel occasionsto provide earlier feedback on whether a transport block is successfullyreceived within one of the TTIs, rather than waiting to provide feedbackuntil after the last TTI of the set of consecutive TTIs.

For communication based on multi-TTI grants and slot aggregation,feedback may occur following the last TTI (for multi-TTI grants) orfollowing the last slot (for aggregated slots). By applying thetechniques described herein that enable earlier feedback, a UE or basestation may be able to reallocate later TTIs within the set ofconsecutive TTIs for other transmissions when the feedback indicatessuccessful receipt of a transport block in one of the earlier TTIs. Inaddition, such early feedback may reduce retransmission latency bypermitting earlier retransmission of TBs that are not successfullyreceived within the set of consecutive TTIs.

A TTI may be a duration of time resources that may be allocated by abase station, and may include one or more symbol periods, mini-slots,slots, subframes, frames, or the like. Consecutive TTIs may refer toTTIs that are immediately consecutive in time to one another and are notseparated by intervening communication resources or transmissions. Insome cases, a duration or a number of consecutive TTIs may be determinedby a transmitter and indicated to a receiver prior to transmission orreception on transmission resources within any TTI of the consecutiveTTIs.

In slot aggregation, the same transport block (TB) may be repeatedlytransmitted (or received) in each slot of multiple consecutive slots,and in some cases a different redundancy version of the same TB may becommunicated within up to each slot of the consecutive slots. Suchretransmissions using slot aggregation may increase the likelihood thata receiver (e.g., a UE, a base station) will successfully decodeinformation contained in the TB in at least one of the slots. Thereceiver may be considered to have successfully decoded the informationif, for example, the bits decoded from a particular slot passes a cyclicredundancy check (CRC). A receiver may be configured to provide feedbackinformation—such as ACK/NACK information, channel state information(CSI), or other types of feedback information—to the transmitter afterthe receiver has received all of the TBs in all of the aggregated slotsand attempted to decode the information in the TB. In some cases, thereceiver may be configured to provide such feedback using an uplinkcontrol channel, such as a physical uplink control channel (PUCCH).

In some cases, the number of consecutive slots to be aggregated (whichmay be referred to as the slot aggregation duration) may be determinedby a transmitter based on channel conditions or other factors. Thetransmitter may transmit an indication of the slot aggregation durationto the receiver using RRC signaling, and hence the slot aggregationduration may be semi-static. In some cases, the transmitter mayconservatively configure the slot aggregation duration to increase thelikelihood that the receiver will be able to successfully decode TBs andto allow for changing channel conditions or other factors.

In some cases, however, a receiver may be able to successfully decode aTB received in an earlier slot of the set of aggregated slots. Thetransmitter may continue, however, to transmit the same TB, or at leasta redundancy version of the same TB, in the remaining slots of the setof aggregated slots, thereby inefficiently using the transmissionresources of the remaining slots. In this case, it may be advantageousfor a receiver to provide early feedback information (e.g., an ACKindication) to the transmitter before the last slot of the aggregatedslots. Such early feedback may enable the transmitter to terminatetransmission of the TB on the remaining slots, thereby freeingtime-frequency resources for other transmissions.

Early feedback may also be useful in the case of multi-TTI grants. Amulti-TTI grant provides a grant of resources to a receiver in multipleconsecutive TTIs for uplink or downlink communication. In some cases, atransmitter (e.g., a base station) may indicate the number of TTIs inthe grant itself (e.g., in downlink control information (DCI)), ratherthan via RRC signaling. In some cases, the number of TTIs may beindicated using a combination of RRC and DCI signaling, where RRCsignaling may be used to indicate the number of TTIs to be potentiallyincluded in a multi-TTI grant and the multi-TTI grant can indicate thespecific TTIs that are scheduled in the multi-TTI grant.

In a multi-TTI grant, each TTI may be used to convey a different TBrather than repeating the same TB (or a different redundancy version ofthe same TB) as in slot aggregation. Early feedback may provideadvantages in the context of multi-TTI grants. For example, if areceiver transmits early feedback (e.g., ACK/NACK feedback) in themiddle of the consecutive TTIs indicating that a TB in one of theconsecutive TTIs was not successfully received, the transmitter may beable to retransmit the TB within a later TTI of the set of consecutiveTTIs, rather than waiting until the transmitter receives feedback afterthe end of the consecutive TTIs. Even if the transmitter is not able toretransmit the TTI with the consecutive set of TTIs, it may be able toretransmit the TB in a TTI that occurs after the end of the set ofconsecutive TTIs sooner because the transmitter is able to process thefeedback earlier. In either case, the latency associated with theretransmission may be reduced.

Aspects of the disclosure are initially described in the context of awireless communications system. The wireless communications system mayprovide for a feedback window for providing early feedback fortransmissions in a set of consecutive TTIs. Aspects of the disclosureare further illustrated by and described with reference to apparatusdiagrams, system diagrams, and flowcharts that relate to providing earlyfeedback with slot aggregation and multi-TTI grants.

FIG. 1 illustrates an example of a wireless communications system 100 inaccordance with aspects of the present disclosure. The wirelesscommunications system 100 includes base stations 105, UEs 115, and acore network 130. In some examples, the wireless communications system100 may be an LTE network, an LTE-A network, or an NR network. In somecases, wireless communications system 100 may support enhanced broadbandcommunications, ultra-reliable (i.e., mission critical) communications,low latency communications, and communications with low-cost andlow-complexity devices.

In accordance with the examples described herein, a base station 105 maytransmit, to a UE 115, a grant of resources of a shared channel over aset of multiple consecutive TTIs, which may be a set of aggregated slotsor may correspond to a multi-TTI grant. The grant of resources may beused for uplink transmission, downlink transmission, or both, within theresources of the shared channel over the set of consecutive TTIs. The UE115 may monitor a control channel for the grant of resources transmittedby base station 105.

In some examples, the UE 115 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of the set of TTIs.The feedback window may include multiple control channel occasions thatare interspersed within a duration of the set of consecutive TTIs.

In some examples, the UE 115 may receive a transport block within afirst TTI of the set of consecutive TTIs, and transmit feedback to thebase station 105 to indicate whether the TB was successfully received.The UE 115 may transmit the feedback within at least one of the multiplecontrol channel occasions.

In some examples, the UE 115 may transmit, to the base station 105, atransport block within a first TTI of the set of consecutive TTIs. TheUE 115 may receive feedback information from the base station 105indicating whether the transport block was successfully received. The UE115 may receive the feedback information within at least one of themultiple control channel occasions.

Base stations 105 may wirelessly communicate with UEs 115 via one ormore base station antennas. Each base station 105 may providecommunication coverage for a respective geographic coverage area 110.Communication links 125 shown in wireless communications system 100 mayinclude uplink transmissions from a UE 115 to a base station 105 ordownlink transmissions from a base station 105 to a UE 115. Controlinformation and data may be multiplexed on an uplink channel or downlinkaccording to various techniques. Control information and data may bemultiplexed on a downlink channel, for example, using time divisionmultiplexing (TDM) techniques, frequency division multiplexing (FDM)techniques, or hybrid TDM-FDM techniques. In some examples, the controlinformation transmitted during a transmission time interval (TTI) of adownlink channel may be distributed between different control regions ina cascaded manner (e.g., between a common control region and one or moreUE-specific control regions).

UEs 115 may be dispersed throughout the wireless communications system100, and each UE 115 may be stationary or mobile. A UE 115 may also bereferred to as a mobile station, a subscriber station, a mobile unit, asubscriber unit, a wireless unit, a remote unit, a mobile device, awireless device, a wireless communications device, a remote device, amobile subscriber station, an access terminal, a mobile terminal, awireless terminal, a remote terminal, a handset, a user agent, a mobileclient, a client, or some other suitable terminology. A UE 115 may alsobe a cellular phone, a personal digital assistant (PDA), a wirelessmodem, a wireless communication device, a handheld device, a tabletcomputer, a laptop computer, a cordless phone, a personal electronicdevice, a handheld device, a personal computer, a wireless local loop(WLL) station, an Internet of Things (IoT) device, an Internet ofEverything (IoE) device, a machine type communication (MTC) device, anappliance, an automobile, or the like.

In some cases, a UE 115 may also be able to communicate directly withother UEs (e.g., using a peer-to-peer (P2P) or device-to-device (D2D)protocol). One or more of a group of UEs 115 utilizing D2Dcommunications may be within the coverage area 110 of a cell. Other UEs115 in such a group may be outside the coverage area 110 of a cell, orotherwise unable to receive transmissions from a base station 105. Insome cases, groups of UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some cases, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out independent of a base station105.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices, and may provide for automated communication betweenmachines, i.e., Machine-to-Machine (M2M) communication. M2M or MTC mayrefer to data communication technologies that allow devices tocommunicate with one another or a base station without humanintervention. For example, M2M or MTC may refer to communications fromdevices that integrate sensors or meters to measure or captureinformation and relay that information to a central server orapplication program that can make use of the information or present theinformation to humans interacting with the program or application. SomeUEs 115 may be designed to collect information or enable automatedbehavior of machines. Examples of applications for MTC devices includesmart metering, inventory monitoring, water level monitoring, equipmentmonitoring, healthcare monitoring, wildlife monitoring, weather andgeological event monitoring, fleet management and tracking, remotesecurity sensing, physical access control, and transaction-basedbusiness charging.

In some cases, an MTC device may operate using half-duplex (one-way)communications at a reduced peak rate. MTC devices may also beconfigured to enter a power saving “deep sleep” mode when not engagingin active communications. In some cases, MTC or IoT devices may bedesigned to support mission critical functions and wirelesscommunications system may be configured to provide ultra-reliablecommunications for these functions.

Base stations 105 may communicate with the core network 130 and with oneanother. For example, base stations 105 may interface with the corenetwork 130 through backhaul links 132 (e.g., S1, etc.). Base stations105 may communicate with one another over backhaul links 134 (e.g., X2,etc.) either directly or indirectly (e.g., through core network 130).Base stations 105 may perform radio configuration and scheduling forcommunication with UEs 115, or may operate under the control of a basestation controller (not shown). In some examples, base stations 105 maybe macro cells, small cells, hot spots, or the like. Base stations 105may also be referred to as evolved NodeBs (eNBs) 105.

A base station 105 may be connected by an S1 interface to the corenetwork 130. The core network may be an evolved packet core (EPC), whichmay include at least one mobility management entity (MME), at least oneserving gateway (S-GW), and at least one Packet Data Network (PDN)gateway (P-GW). The MME may be the control node that processes thesignaling between the UE 115 and the EPC. All user Internet Protocol(IP) packets may be transferred through the S-GW, which itself may beconnected to the P-GW. The P-GW may provide IP address allocation aswell as other functions. The P-GW may be connected to the networkoperators IP services. The operators IP services may include theInternet, the Intranet, an IP Multimedia Subsystem (IMS), and aPacket-Switched (PS) Streaming Service.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. At least some of the networkdevices, such as base station 105 may include subcomponents such as anaccess network entity, which may be an example of an access nodecontroller (ANC). Each access network entity may communicate with anumber of UEs 115 through a number of other access network transmissionentities, each of which may be an example of a smart radio head, or atransmission/reception point (TRP). In some configurations, variousfunctions of each access network entity or base station 105 may bedistributed across various network devices (e.g., radio heads and accessnetwork controllers) or consolidated into a single network device (e.g.,a base station 105).

Wireless communications system 100 may operate in an ultra-highfrequency (UHF) frequency region using frequency bands from 700 MHz to2600 MHz (2.6 GHz), although some networks (e.g., a wireless local areanetwork (WLAN)) may use frequencies as high as 4 GHz. This region mayalso be known as the decimeter band, since the wavelengths range fromapproximately one decimeter to one meter in length. UHF waves maypropagate mainly by line of sight, and may be blocked by buildings andenvironmental features. However, the waves may penetrate wallssufficiently to provide service to UEs 115 located indoors. Transmissionof UHF waves is characterized by smaller antennas and shorter range(e.g., less than 100 km) compared to transmission using the smallerfrequencies (and longer waves) of the high frequency (HF) or very highfrequency (VHF) portion of the spectrum. In some cases, wirelesscommunications system 100 may also utilize extremely high frequency(EHF) portions of the spectrum (e.g., from 30 GHz to 300 GHz). Thisregion may also be known as the millimeter band, since the wavelengthsrange from approximately one millimeter to one centimeter in length.Thus, EHF antennas may be even smaller and more closely spaced than UHFantennas. In some cases, this may facilitate use of antenna arrayswithin a UE 115 (e.g., for directional beamforming). However, EHFtransmissions may be subject to even greater atmospheric attenuation andshorter range than UHF transmissions.

Thus, wireless communications system 100 may support millimeter wave(mmW) communications between UEs 115 and base stations 105. Devicesoperating in mmW or EHF bands may have multiple antennas to allowbeamforming. That is, a base station 105 may use multiple antennas orantenna arrays to conduct beamforming operations for directionalcommunications with a UE 115. Beamforming (which may also be referred toas spatial filtering or directional transmission) is a signal processingtechnique that may be used at a transmitter (e.g., a base station 105)to shape and/or steer an overall antenna beam in the direction of atarget receiver (e.g., a UE 115). This may be achieved by combiningelements in an antenna array in such a way that transmitted signals atparticular angles experience constructive interference while othersexperience destructive interference.

Multiple-input multiple-output (MIMO) wireless systems use atransmission scheme between a transmitter (e.g., a base station 105) anda receiver (e.g., a UE 115), where both transmitter and receiver areequipped with multiple antennas. Some portions of wirelesscommunications system 100 may use beamforming. For example, base station105 may have an antenna array with a number of rows and columns ofantenna ports that the base station 105 may use for beamforming in itscommunication with UE 115. Signals may be transmitted multiple times indifferent directions (e.g., each transmission may be beamformeddifferently). A mmW receiver (e.g., a UE 115) may try multiple beams(e.g., antenna subarrays) while receiving the synchronization signals.

In some cases, the antennas of a base station 105 or UE 115 may belocated within one or more antenna arrays, which may support beamformingor MIMO operation. One or more base station antennas or antenna arraysmay be collocated at an antenna assembly, such as an antenna tower. Insome cases, antennas or antenna arrays associated with a base station105 may be located in diverse geographic locations. A base station 105may multiple use antennas or antenna arrays to conduct beamformingoperations for directional communications with a UE 115.

In some cases, wireless communications system 100 may be a packet-basednetwork that operate according to a layered protocol stack. In the userplane, communications at the bearer or Packet Data Convergence Protocol(PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may insome cases perform packet segmentation and reassembly to communicateover logical channels. A Medium Access Control (MAC) layer may performpriority handling and multiplexing of logical channels into transportchannels. The MAC layer may also use Hybrid ARQ (HARD) to provideretransmission at the MAC layer to improve link efficiency. In thecontrol plane, the Radio Resource Control (RRC) protocol layer mayprovide establishment, configuration, and maintenance of an RRCconnection between a UE 115 and a network device, base station 105, orcore network 130 supporting radio bearers for user plane data. At thePhysical (PHY) layer, transport channels may be mapped to physicalchannels.

Time intervals in LTE or NR may be expressed in multiples of a basictime unit (which may be a sampling period of T_(s)=1/30,720,000seconds). Time resources may be organized according to radio frames oflength of 10 ms (T_(f)=307200 T_(s)), which may be identified by asystem frame number (SFN) ranging from 0 to 1023. Each frame may includeten 1 ms subframes numbered from 0 to 9. A subframe may be furtherdivided into two 0.5 ms slots, each of which contains 6 or 7 modulationsymbol periods (depending on the length of the cyclic prefix prependedto each symbol). Excluding the cyclic prefix, each symbol contains 2048sample periods. In some cases, the subframe may be the smallestscheduling unit, also known as a transmission time interval (TTI). Inother cases, a TTI may be shorter than a subframe or may be dynamicallyselected (e.g., in short TTI bursts or in selected component carriersusing short TTIs, for example, slots or mini-slots). [this descriptionseems unclear about what the relationship/distinction between slots andTTIs is—sounds like a slot is a short TTI?]

A resource element may consist of one symbol period and one subcarrier(e.g., a 15 KHz frequency range). A resource block may contain 12consecutive subcarriers in the frequency domain and, for a normal cyclicprefix in each orthogonal frequency division multiplexing (OFDM) symbol,7 consecutive OFDM symbols in the time domain (1 slot), or 84 resourceelements. The number of bits carried by each resource element may dependon the modulation scheme (the configuration of symbols that may beselected during each symbol period). Thus, the more resource blocks thata UE receives and the higher the modulation scheme, the higher the datarate may be.

Wireless communications system 100 may support operation on multiplecells or carriers, a feature which may be referred to as carrieraggregation (CA) or multi-carrier operation. A carrier may also bereferred to as a component carrier (CC), a layer, a channel, etc. Theterms “carrier,” “component carrier,” “cell,” and “channel” may be usedinterchangeably herein. A UE 115 may be configured with multipledownlink CCs and one or more uplink CCs for carrier aggregation. Carrieraggregation may be used with both frequency division duplexing (FDD) andtime division duplexing (TDD) component carriers.

In some cases, wireless communications system 100 may utilize enhancedcomponent carriers (eCCs). An eCC may be characterized by one or morefeatures including: wider bandwidth, shorter symbol duration, shorterTTIs, and modified control channel configuration. In some cases, an eCCmay be associated with a carrier aggregation configuration or a dualconnectivity configuration (e.g., when multiple serving cells have asuboptimal or non-ideal backhaul link). An eCC may also be configuredfor use in unlicensed spectrum or shared spectrum (where more than oneoperator is allowed to use the spectrum). An eCC characterized by widebandwidth may include one or more segments that may be utilized by UEs115 that are not capable of monitoring the whole bandwidth or prefer touse a limited bandwidth (e.g., to conserve power).

In some cases, an eCC may utilize a different symbol duration than otherCCs, which may include use of a reduced symbol duration as compared withsymbol durations of the other CCs. A shorter symbol duration isassociated with increased subcarrier spacing. A device, such as a UE 115or base station 105, utilizing eCCs may transmit wideband signals (e.g.,20, 40, 60, 80 MHz, etc.) at reduced symbol durations (e.g., 16.67microseconds). A TTI in eCC may consist of one or multiple symbols. Insome cases, the TTI duration (that is, the number of symbols in a TTI)may be variable.

A shared radio frequency spectrum band may be utilized in an NR sharedspectrum system. For example, an NR shared spectrum may utilize anycombination of licensed, shared, and unlicensed spectrums, among others.The flexibility of eCC symbol duration and subcarrier spacing may allowfor the use of eCC across multiple spectrums. In some examples, NRshared spectrum may increase spectrum utilization and spectralefficiency, specifically through dynamic vertical (e.g., acrossfrequency) and horizontal (e.g., across time) sharing of resources.

In some cases, wireless system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, wireless system100 may employ LTE License Assisted Access (LTE-LAA) or LTE Unlicensed(LTE U) radio access technology or NR technology in an unlicensed bandsuch as the 5 GHz Industrial, Scientific, and Medical (ISM) band. Whenoperating in unlicensed radio frequency spectrum bands, wireless devicessuch as base stations 105 and UEs 115 may employ listen-before-talk(LBT) procedures to ensure the channel is clear before transmittingdata. In some cases, operations in unlicensed bands may be based on a CAconfiguration in conjunction with CCs operating in a licensed band.Operations in unlicensed spectrum may include downlink transmissions,uplink transmissions, or both. Duplexing in unlicensed spectrum may bebased on FDD, TDD, or a combination of both.

LTE and NR provide for multi-TTI grants in which a base station grantsresources to a UE over multiple TTIs. NR systems also provide for slotaggregation in which a base station may grant a UE resources in one ormore slots. Conventional LTE and NR systems lack techniques forproviding early feedback within a multi-TTI grant or within a set ofaggregated slots. The described techniques may enable a UE to provideearly feedback to a base station before the end of a multi-TTI grant ora set of aggregated slots.

FIG. 2 illustrates an example diagram 200 of a wireless communicationssystem in accordance with aspects of the present disclosure. In someexamples, wireless communications system 200 may implement aspects ofwireless communication system 100. Wireless communications system 200may include a base station 105-a and a UE 115-a, which may be examplesof the corresponding devices described with reference to FIG. 1.

In some examples, base station 105-a may communicate with one or moreUEs 115 within geographic coverage area 205. For example, base station105-a may be in communication with UE 115-a via bidirectionalcommunication link 210. In some examples, time and frequency resourcesmay include a bandwidth that is divided into transmission time intervals(TTIs) 215 in which the base station 105-a and UE 115-a may communicate.The TTIs 215-a may represent time durations that may be of a fixedlength within the bandwidth. In some examples, a base station 105-a mayprovide a multi-TTI grant of multiple consecutive TTIs 220 to a UE115-a, and the base station 105-a and the UE 115-a may use the resourcesassociated with the multiple consecutive TTIs 220 for communication ofuplink and/or downlink data.

In some examples, time and frequency resources may include a bandwidththat is divided into TTIs in which the base station 105-a and UE 115-amay communicate. A TTI may be a duration of time resources that may beallocated by a base station, and may include one or more symbol periods,mini-slots, slots, subframes, frames, or the like.

In some cases, a base station 105-a may allocate a set of aggregatedslots for communication with a UE 115-a. In some examples, a set ofaggregated slots may be an example of consecutive TTIs; thus,consecutive TTIs 220 as depicted in FIG. 2 may also depict a set ofaggregated slots. The base station 105-a may signal the aggregated slotduration (e.g., the number of slots in the set of aggregated slots) tothe UE using, for example, control signaling such as RRC signaling.

FIG. 3 illustrates an example communication timeline 300 depicting atimeline for receiving (e.g., by a UE 115) transport blocks in a set ofaggregated slots 305 and providing early feedback (e.g., to a basestation 105). In some examples, communication timeline 300 may implementaspects of wireless communication system 100. In some examples,communication timeline 300 may depict communications between a basestation (e.g., base station 105) and a UE (e.g., UE 115) as describedwith reference to FIGS. 1-2.

The UE 115 may receive the transport blocks from a base station 105during a downlink transmission, such as a physical downlink sharedchannel (PDSCH) transmission, for example. The set of aggregated slots305 may be preceded by a downlink control channel occasion 310 andfollowed by an uplink control channel occasion 315. The set ofaggregated slots 305 may be consecutive slots (e.g., consecutive TTIs)used for communication of data between a UE 115 and a base station 105.While FIG. 3 depicts a set of aggregated slots 305 having eightconsecutive slots, other examples of sets of aggregated slots mayinclude more or fewer slots.

A base station 105 may transmit data or other information within theslots using TBs. In some cases, a base station 105 may transmit the sameTB (or a redundancy version of the same TB) in each slot of theaggregated slots 305.

In some examples, the downlink control channel occasion 310 may be aperiod of time during which a UE monitors a downlink control channel(e.g., a physical downlink control channel (PDCCH)) for downlink controlinformation (DCI) related to a downlink transmission (e.g., a PDSCHtransmission), which may include a grant of resources for transmission.In some examples, the downlink control channel occasion 310 may be of ashorter duration or the same duration as a slot in the aggregated set ofslots.

In some examples, the uplink control channel occasion 315 may be aperiod of time during which a UE 115 may transmit feedback informationor other control information to a base station 105 on an uplink controlchannel (e.g., a physical uplink control channel (PUCCH)). Such feedbackor control information may be related to data received from the basestation during a PDSCH transmission and may include, for example, HARQfeedback such as ACK/NACK feedback, CSI feedback, uplink controlinformation (UCI), or other forms of feedback or control information. Insome examples, the uplink control channel occasion 315 may be of ashorter duration or the same duration as a slot in the aggregated set ofslots. In some examples, the uplink control channel occasion 315 mayoccur in a slot that occurs after the set of aggregated slots 305.

In some examples, the downlink control channel occasion 310 may beseparated from the first slot 305-a by a first gap 320-a. In someexamples, the uplink control channel occasion 315 may be separated fromthe last slot 305-h by a second gap 320-b. In some cases, a gap 320-amay be a period of time that is based on the amount of time required fora UE to process a grant and begin transmitting or receiving data.

In some examples, a base station 105 may determine a slot aggregationduration 325 for transmitting data to a UE 115. The slot aggregationduration 325 may be a duration of time consumed by the aggregated slots305. A base station 105 may transmit an indication of the slotaggregation duration 325 to the UE 115 via, for example, RRC signaling.Thus, the slot aggregation duration 325 (e.g., the number of slots inthe set of aggregated slots) may be configured semi-statically.

In some cases, in slot aggregation, a base station 105 may transmit thesame TB multiple times to a UE 115 to improve a link budget, forexample. Thus, in some cases, a TB may be transmitted in each slot 305of the set of aggregated slots, and, in some cases, a differentredundancy version of the same TB may be transmitted in up to each slotof the set of consecutive slots. In some cases, the base station 105 mayinform the UE 115 of which redundancy version is being sent in whichslot of the set of consecutive slots, (e.g., a include a redundancyversion identification (RVID)), or a transmission of a TB in aparticular slot may include information identifying which redundancyversion of the TB is being sent in that slot. In some examples, the basestation 105 may configure the slot duration along with the correspondingRVID on each slot. In some cases, during slot aggregation, one slot maybe punctured if the uplink or downlink configuration indicates that theslot is not used for the corresponding downlink or uplink transmission.A UE 115 may monitor resources during the aggregated slots 305 toreceive TBs in each of the aggregated slots 305. The UE 115 may thenattempt to decode each TB as it is received.

In some cases, a UE 115 may transmit, to the base station 105, feedbackinformation during the uplink control channel occasion 315, which mayoccur after all of the slots in the set of aggregated slots 305. Suchfeedback information may include, for example, ACK/NACK feedbackindicating whether the TB was successfully decoded, CSI feedbackindicating the state of the communication channel, and/or other types offeedback. The UE 115 may transmit the feedback information to the basestation 105 via an uplink control channel (e.g., using PUCCH resources).

In the example of FIG. 3, the slot aggregation duration 325 is aduration of eight slots (Slot0-Slot7), which may correspond to eightrepeated TBs. If the UE is able to successfully decode the TB by thelast (eighth) slot of the set of aggregated slots 305, the UE 115 maytransmit, during the uplink control channel occasion 315, feedbackinformation to the base station 105 that includes ACK feedbackindicating that the TB was successfully received. If the UE is not ableto successfully decode the TB by the last slot, the UE 115 may transmitfeedback information to the base station 105 that includes NACK feedbackindicating that the TB was unsuccessfully received.

In some cases, however, the UE 115 may be able to decode the TB usingfewer slots than the set of aggregated slots 305. For example, a UE maybe able to decode the TB after two slots 305-a, 305-b (e.g., afterreceiving two TBs). In this case, the UE may not need to receive theremaining TBs for decoding. However, if the UE waits to transmit ACKfeedback until the uplink control channel occasion 315, which occursafter all of the aggregated slots, a base station 105 may not receivethe ACK until the base station has already transmitted all of the TBsusing the full set of aggregated slots 305. These unneeded transmissionsmay introduce unnecessary system overhead. Thus, in some cases, it maybe advantageous for the UE 115 to provide earlier feedback to enableearly termination of transmissions that use slot aggregation.

FIG. 4 illustrates an example communication timeline 400 depicting atimeline for receiving (e.g., by a UE 115) transport blocks in a set ofaggregated slots 405 and providing early feedback (e.g., to a basestation 105) in the middle of the aggregated slots 405. In someexamples, communication timeline 400 may depict communications between abase station (e.g., base station 105) and a UE (e.g., UE 115) asdescribed with reference to FIGS. 1-2.

The UE 115 may receive the transport blocks from a base station 105during a downlink transmission, such as a PDSCH transmission, forexample. While the following discussion focuses on a base stationtransmitting TBs to a UE, similar techniques may be applied to a UEtransmitting TBs to a base station.

The set of aggregated slots 405 may be preceded by a downlink controlchannel occasion 410 and followed by an uplink control channel occasion415. The set of aggregated slots 405 may be consecutive slots used forcommunication of data (e.g., TBs) between a UE and a base station, suchas UE 115 or base station 105. The slot aggregation duration 425 may bea duration of time consumed by the aggregated slots 405. In some cases,a base station 105 may transmit the same TB (or a redundancy version ofthe same TB) in each of the aggregated slots 405.

Communication timeline 400 further includes control channel occasions430 interspersed within the duration of the aggregated slots 405. Insome examples, control channel occasions 430 may provide opportunitiesfor the UE to provide feedback information in the middle of theaggregated slots 405; e.g., before the uplink control channel occasion415. The UE may transmit feedback information via a control channel(e.g., using PUCCH resources) during one or more of the control channeloccasions 430. A control channel occasion 430 may be one or more symbolperiods within a particular slot 405 in which the UE 115 may transmitfeedback information.

Communication timeline 400 includes feedback window 435, which may be aduration of time that begins at the start of the first control channeloccasion 430-a and finishes at the end of the uplink control channeloccasion 415. Thus, feedback window 435 may be a window of time duringwhich a UE may have multiple opportunities to transmit feedbackinformation during one or more control channel occasions 430 or duringthe uplink control channel occasion 415. In some examples, feedbackwindow 435 may be offset in time relative to the beginning slot of theset of aggregated slots by offset 440; that is, feedback window 435 maynot begin at the same time as the beginning slot 405-a.

In some examples, a UE 115 may receive (e.g., from a base station 105)an indication of the start of the feedback window 435 (e.g., an earliestcontrol channel occasion) and/or a duration of the feedback window. TheUE 115 may receive the indication of the start of the feedback windowand/or the duration of the feedback window via RRC signaling, forexample, or as part of a grant received during the downlink controlchannel occasion 410 using PDCCH resources.

In some cases, reduced feedback information (e.g., light feedback) maybe transmitted during a control channel occasion 430 that is a subset ofthe feedback information that may be transmitted during an uplinkcontrol channel occasion 415. Such reduced feedback information mayconsume fewer resources than regular feedback information. For example,reduced feedback information may include only ACK/NACK feedback toindicate whether a TB was successfully received, in which case thereduced feedback information may consume only one bit (e.g., ‘0’ toindicate a NACK or ‘1’ to indicate an ACK, or vice versa). In somecases, reduced feedback information may additionally or alternativelyinclude delta CSI information (e.g., indicating a change in the channelstate information) and/or an indication of the number of additional TBsthe UE needs in order to successfully decode the data in the TB. In thiscase, the reduced feedback information may consume one or more bits, ormay potentially consume as many bits as regular feedback information.

In some examples, if a UE 115 is able to decode a TB before the lastslot 405-h of the aggregated slots 405, the UE may transmit feedbackinformation, such as an ACK, during one or more of the control channeloccasions 415. A base station 105 may receive the early ACK feedbackfrom the UE 115 (e.g., by monitoring an uplink control channel, such asPUCCH), and may terminate PDSCH transmission on the remaining slots thatare configured for slot aggregation (e.g., the remaining slots in theset of aggregated slots).

In some examples, if a UE 115 is not able to decode the TB before aparticular control channel occasion 430, the UE 115 may not transmit anyfeedback information during the particular control channel occasion 430or may transmit a NACK indication during the particular control channeloccasion 430. In some examples, if the base station 105 detects earlyACK feedback from the UE, the base station may terminate PDSCHtransmission on the remaining slots configured for slot aggregation.

In some examples, a UE 115 may transmit feedback information in aparticular control channel occasion 430 corresponding to a particularslot 405 (or a prior slot), such as an ACK to indicate successfulreceipt of the TB in the particular slot or a NACK to indicateunsuccessful receipt of the TB in the particular slot.

In some examples, if the UE 115 transmits feedback information during acontrol channel occasion 415, the UE may not transmit any feedbackinformation or may not transmit the same feedback information insubsequence control channel occasions 430. For example, if a UE 115transmits an ACK in a first control channel occasion 430, the UE 115 maynot transmit another ACK in any subsequent control channel occasion 430.In some examples, the UE 115 may not transmit any feedback informationin any subsequent control channel occasions 430.

In some examples, if a UE 115 transmits an ACK within a control channeloccasion 430 corresponding to a particular slot 405, the UE maydiscontinue monitoring some or all of the slots that occur after theparticular slot in the set of aggregated slots 405.

In some examples, if a UE 115 transmits an ACK within a control channeloccasion 430 corresponding to a particular slot 405, the UE may continueto monitor some or all of the slots that occur after the particular slotin the set of aggregated slots. In this case, the UE may receive adifferent redundancy version of the same TB in one or more subsequentslots, and may transmit feedback information during one or moresubsequent control channel occasion(s). In some cases, the UE maymonitor at least two slots of the set of aggregated slots for adifferent redundancy version of the TB. In some cases, the UE mayreceive a second indicator that associates a redundancy version with aparticular slot of the set of aggregated slots. For example, a basestation 105 may inform a UE 115 of which redundancy version of the sameTB is being sent in which TTI of the set of consecutive TTIs.

In some examples, if the UE 115 fails to decode the TB before the end ofthe aggregated slots 405, the UE may transmit regular feedbackinformation, such as a NACK or delta CSI, or discontinuous transmission(DTX) information on the PUCCH resource during the uplink controlchannel occasion 415.

In some examples, if the UE 115 is operating on a shared radio frequencyspectrum band (e.g., an unlicensed spectrum), the UE 115 may perform aclear channel assessment on the shared radio frequency spectrum bandprior to transmitting feedback during a control channel occasion 430. Aclear channel assessment may be performed using a listen-before-talk(LBT) procedure, for example.

In some cases, it may be advantageous for a UE 115 to have multipleopportunities to provide feedback information in the middle of theaggregated slots 405 to allow for early transmission termination andbetter turn-around time (e.g., to enable a base station to terminatetransmission of TBs before the end of the aggregated slots and initiateother communications). In addition, it may be advantageous for a UE tohave multiple opportunities to send feedback information duringcommunications in an unlicensed spectrum (e.g., to re-transmit feedbackinformation in multiple control channel occasions) in case an initialtransmission of feedback information is not successfully received by thebase station due to receiver interference or a failure of the LBTprocedure, for example. If a UE 115 is unable to transmit feedbackduring a particular control channel occasion because the LBT proceduredetermines that the channel is not available, the UE 115 may re-attemptto transmit the feedback during or more subsequent control channeloccasions. Such feedback retransmission may help to increase the PUCCHreliability.

In some cases, each slot of the set of aggregated slots 405 isassociated with a corresponding control channel occasion 430, such thatthe number of control channel occasions 430 is the same as the number ofslots in the set of aggregated slots. In some cases, some slots in theset of aggregated slots 405 may not be associated with a correspondingcontrol channel occasion 430. For example, the last slot 405-h of theset of aggregated slots 405 may not have a corresponding control channeloccasion 430 since the base station may have already transmitted all ofthe TBs and therefore may not benefit from receiving feedbackinformation corresponding to the last slot 405-h. For example, the firstslot 405-a of the set of aggregated slots 405 may not have acorresponding control channel occasion 430 because the UE may requireadditional time to switch from receiving TBs to transmitting feedback,or because the UE may be unlikely to be able to decode the TB using onlythe TB conveyed in the first slot 405-a. Other slots in the set ofaggregated slots 405 may not have corresponding control channeloccasions 430.

In general, there may be a tradeoff between the number of controlchannel occasions 430 in which a UE 115 has an opportunity to providefeedback and the overhead associated with such opportunities.

In some cases, a base station may determine the start of the feedbackwindow 435 (e.g., an earliest control channel occasion) based on acapability of the UE. Thus, a time period between the beginning TTI andthe earliest control channel occasion may be based on a capability ofthe UE. A UE may transmit a capability indicator to the base station 105that indicates one or more of the UE's capabilities via, for example,RRC signaling. Such capabilities may include, for example, the symbolperiod (e.g., the number of OFDM symbols) or time duration required forthe UE to switch from receiving data to transmitting feedback. In somecases, a base station may transmit an indication of the start of thefeedback window following K1 signaling in PDCCH, and based on a UEcapability report on N1 and N1′. N1 is the number of OFDM symbols afterthe end of PDSCH reception to an earliest start of a correspondingACK/NACK transmission on PUCCH resources by the UE 115, and N1′ is thenumber of OFDM symbols after the end of PDSCH reception to an earlieststart of a corresponding ACK/NACK transmission piggybacked on a physicaluplink shared channel (PUSCH). Due to PUSCH transmission associated withN1′, N1′>=N1. K1 is the number of slots after the end of PDSCH receptionto an earliest start of a corresponding ACK/NACK transmission by the UE115.

In some cases, if a UE 115 transmits an ACK in one of the controlchannel occasions 430, the UE may refrain from retransmitting the ACK ortransmitting subsequent feedback during subsequent channel controloccasions 430. In some cases, the UE may retransmit the ACK during oneor more subsequent control channel occasions 430 and/or during theuplink control channel occasion 415.

In some cases, if a UE 115 transmits an ACK indication during one of thecontrol channel occasions 430, the UE may refrain from transmittingfeedback information during the uplink control channel occasion 415, ormay transmit a reduced set of feedback during the uplink control channeloccasion 415. For example, if the UE transmits an ACK during a controlchannel occasion 430, the UE may refrain from transmitting an ACK duringthe uplink control channel occasion 415, but may still transmit CSIinformation or other types of information during the uplink controlchannel occasion 415.

In some cases, if a UE 115 transmits feedback (e.g., an ACK) during oneof the control channel occasions 430, the UE 115 may subsequentlytransmit regular feedback information during the uplink control channeloccasion 415, which may include an ACK/NACK indication, CSI information,or other types of information. In some cases, the UE 115 may transmitfeedback during the uplink control channel occasion 415 that consumesregular PUCCH overhead, depending on the presence of CSI information.

In some cases, a single multi-TTI grant (e.g., received via PDCCH) mayindicate multiple transmissions (e.g., multiple PDSCH transmissions)over multiple TTIs. The above-described techniques for transmitting(e.g., by a UE) early feedback information during communications basedon slot aggregation may be extended to the case of multi-TTI grants.

FIG. 5 illustrates an example communication timeline 500 depicting atimeline for receiving (e.g., by a UE 115) consecutive TTIs 505 based ona multi-TTI grant and providing early feedback (e.g., to a base station105). In some examples, communication timeline 500 may depictcommunications between a base station (e.g., base station 105) and a UE(e.g., UE 115) as described with reference to FIGS. 1-2.

The UE 115 may receive TBs in the consecutive TTIs from a base station105 during a downlink transmission, such as a PDSCH transmission, forexample. Consecutive TTIs 505 may be preceded by a downlink controlchannel occasion 510 and followed by an uplink control channel occasion515. The multi-TTI grant duration 525 may be a duration of time consumedby the consecutive TTIs 505.

In the depicted example, UE 115 may receive, during the downlink controlchannel occasion 510, a multi-TTI grant 545 that indicates that UE 115is being granted resources in a set of consecutive TTIs 505 beginning atTTI0 and continuing through TTI7. The granted resources may include atleast a portion of a bandwidth and one or more symbol periods of a datachannel within each TTI of the consecutive TTIs 505.

Communication timeline 500 further includes control channel occasions530 interspersed within the duration of the consecutive TTIs 505. Insome examples, control channel occasions 530 may provide opportunitiesfor the UE to provide feedback information in the middle of theconsecutive TTIs 505; e.g., before the uplink control channel occasion515. The UE may transmit the feedback information via a control channel(e.g., using PUCCH resources) during one or more control channeloccasions 530. A control channel occasion 530 may be one or more symbolperiods within a particular TTI 505 in which the UE 115 may transmitfeedback information.

Communication timeline 500 includes feedback window 535, which may be aduration of time that begins at the start of the first control channeloccasion 530-a and finishes at the end of the uplink control channeloccasion 515. Thus, feedback window 535 may be a window of time duringwhich a UE may have multiple opportunities to transmit feedbackinformation during one or more control channel occasions 530 or duringthe uplink control channel occasion 515.

In some examples, feedback window 535 may be offset in time relative tothe beginning TTI of the consecutive TTIs by offset 540; that is,feedback window 535 may not begin at the same time as the beginning TTI505-a.

In some examples, a UE 115 may receive (e.g., from a base station 105)an indication of the start of the feedback window 535 and/or a durationof the feedback window. The UE may receive the indication of the startof the feedback window and/or the duration of the feedback window aspart of the multi-TTI grant, for example, or via RRC signaling.

As described with respect to FIG. 4, in some cases, feedback informationthat may be transmitted during a control channel occasion 530 (which maybe referred to as reduced feedback) may be a subset of the regularfeedback information that may be transmitted during an uplink controlchannel occasion 515. Such reduced feedback information may consumefewer resources than regular feedback information.

In some examples, if a UE is able to decode a TB in a particular TTI505, the UE may transmit an ACK during the corresponding control channeloccasion 530 or during a subsequent control channel occasion. Forexample, if a UE is able to decode a TB in TTI2 505-d, the UE maytransmit an ACK during corresponding control channel occasion 530-d orduring a subsequent control channel occasion.

In some examples, if a UE is not able to decode a TB in a particular TTI505, the UE may transmit a NACK during the corresponding control channeloccasion or during a subsequent control channel occasion. For example,if a UE is not able to decode a TB in TTI7 505-h, the UE may transmit aNACK during corresponding control channel occasion 530-h or during asubsequent control channel occasion.

In some examples, a UE 115 may transmit feedback information during acontrol channel occasion 530 indicating whether all of the TBs inprevious TTIs (e.g., in TTIs occurring before the control channeloccasion 530) have been successfully or unsuccessfully received. Forexample, if a UE is able to decode TBs in TTI0 505-b, TTI1 505-c, andTTI2 505-d, the UE may transmit an ACK during control channel occasion530-d (or during a subsequent control channel occasion). Thus, thereduced (light) PUCCH feedback may indicate feedback for each individualTB or it may indicate feedback for all TBs up to the current decodingresults. In some cases, such feedback may include a bit sequence thatindicates whether each TB in a prior TTI was successfully received;e.g., a sequence of “0,0,1,1” may indicate that the first two TBs werenot successfully received and the next two TBs were successfullyreceived.

In some examples, if a UE 115 transmits an ACK within a control channeloccasion 530 corresponding to a particular TTI 505, the UE may continueto monitor some or all of the TTIs 505 that occur after the particularTTI in the consecutive TTIs. In this case, the UE 115 may receiveadditional TBs in one or more subsequent TTIs 505 and may transmitfeedback information related to the additional TBs in one or moresubsequent control channel occasion(s) 530.

In some cases, it may be advantageous for a UE 115 to have multipleopportunities to provide feedback information to a base station 105 inthe middle of the consecutive TTIs 505, to, for example, enable the basestation to schedule additional transmissions for the UE 115 or preparesubsequent TBs with more turn-around time.

In some cases, a TB may be segmented into multiple code blocks (CBs)when the TB size is sufficiently large, and a group of CBs may begrouped together to form a code block group (CBG). As discussed in moredetail with reference to FIG. 6, in some cases, early feedback in themiddle of consecutive TTIs may also provide detailed CBG-level feedbackfor better feedback granularity such that a base station only needs toretransmit the failed CBGs and does not need to retransmit thesuccessful CBGs. A UE may indicate ACK/NACK feedback for each CBG toallow the base station to retransmit the failed CBGs for better systemefficiency.

In some cases, each TTI of the consecutive TTIs 505 is associated with acorresponding control channel occasion 530, such that the number ofcontrol channel occasions 530 is the same as the number of TTIs in theconsecutive TTIs. In some cases, some TTIs in the set of consecutiveTTIs 505 may not be associated with a corresponding control channeloccasion 530. For example, the first TTI 505-a of the consecutive TTIs505 may not have a corresponding control channel occasion 530 becausethe UE may require additional time to switch from receiving the TBs totransmitting feedback.

In some cases, a base station 105 may determine the start of thefeedback window 535 (e.g., an earliest control channel occasion) basedon the capabilities of the UE 115. A UE 115 may transmit a capabilityindicator that indicates of one or more of its capabilities to the basestation using, for example, RRC signaling. Such capabilities mayinclude, for example, the number of OFDM symbols or time durationrequired for a UE to switch from receiving data to transmittingfeedback. In some cases, the time period from the individual PDSCH tothe lighter PUCCH (e.g., a control channel occasion) can follow K1signaling in PDCCH based on a UE capability report on N1 and N1′.

FIG. 6 illustrates an example communication timeline 600 depicting atimeline for transmitting (e.g., by a UE 115) TBs in a set of aggregatedslots 605 and receiving early feedback (e.g., from a base station 105)during a feedback window 635. In some examples, communication timeline600 may depict communications between a base station (e.g., base station105) and a UE (e.g., UE 115) as described with reference to FIGS. 1-2.

The UE 115 may transmit the TBs to the base station 105 during an uplinktransmission, such as a physical uplink shared channel (PUSCH)transmission, for example. The UE 115 may receive the feedbackinformation in an uplink grant in the middle of the aggregates slots toterminate the remaining uplink transmission from the UE, for example.

The set of aggregated slots 605 may be preceded by a first downlinkcontrol channel occasion 610-a and followed by a second downlink controlchannel occasion 610-b. The downlink control channel occasions 610 mayprovide opportunities for the UE 115 to receive downlink controlinformation (DCI) or feedback information from a base station 105 onPDCCH resources, for example. The set of aggregated slots 605 may beconsecutive slots used for communication of data (e.g., in TBs) from UE115 to base station 105. In some cases, the UE 115 may transmit the sameTB (or a redundancy version of the same TB) in each of the aggregatedslots 605.

Communication timeline 600 further includes control channel occasions630 interspersed within the slot aggregation duration 625 of theaggregated slots 605. In some examples, control channel occasions 630may provide opportunities for the UE 115 to receive feedback informationfrom the base station 105 in the middle of the aggregated slots 605;e.g., before the second downlink control channel occasion 610-b. The UEmay monitor a control channel (e.g., PDCCH) during one or more of thecontrol channel occasions 630, and may receive feedback information fromthe base station 105 via the control channel (e.g., using PDCCHresources) during one or more of the control channel occasions 630.

Communication timeline 600 includes feedback window 635, which may be aduration of time that begins at the start of the first control channeloccasion 630-a and finishes at the end of second downlink controlchannel occasion 610-b. Thus, feedback window 635 may be a window oftime during which a UE may monitor a downlink control channel (e.g.,PDCCH) for feedback during the control channel occasions 630 and duringthe second downlink control channel occasion 610-b. In some examples,feedback window 635 may be offset in time relative to the beginning slotof the set of aggregated slots by offset 660; that is, feedback window635 may not begin at the same time as the beginning slot 605-a.

In some examples, the UE 115 may receive (e.g., from a base station 105)an indication of the start of the feedback window 635 and/or a durationof the feedback window 635. The UE 115 may receive the indication of thestart of the feedback window and/or the duration of the feedback windowvia RRC signaling, for example, or as part of a grant received duringthe first downlink control channel occasion 610-a using PDCCH resources.

In some examples, a UE 115 may transmit, to the base station 105, acapability indicator that indicates the UE 115 capabilities, asdescribed earlier with respect to FIG. 4. In some cases, the start ofthe feedback window 635 may be based on the UE 115 capabilities.

In some examples, the start of the feedback window 635 may be based onthe base station's processing timeline. For example, if the UE 115 isserving as a transmitter and is transmitting TBs to a base station, thestart of the feedback window 635 may be based on an amount of time ittakes for a base station to attempt to decode a TB and transmitfeedback.

In some examples, a UE 115 may receive, from base station 105, feedbackinformation during one or more of the control channel occasions 630indicating whether a TB was successfully received by the base station105. In some examples, if the UE 115 receives feedback informationduring a particular control channel occasion 630 that indicates that theTB was successfully received, the UE 115 may not retransmit the TB ineach of the subsequent slots (e.g., slots that occur after theparticular control channel occasion 630) of the set of aggregated slots605; that is, the UE 115 may terminate TB transmission early. In someexamples, if the UE 115 receives feedback information during aparticular control channel occasion 630 that indicates that the TB wasunsuccessfully received, the UE 115 may continue to retransmit the TB inone or more subsequent slots of the set of aggregated slots 605 and notterminate TB transmission early.

In some examples, if early termination is not supported (e.g., by the UE115 or the base station 105), the UE may be configured to refrain from(e.g., skip) monitoring some or all of the control channel occasions630.

In some examples, feedback information transmitted by a base station 105and received by the UE 115 during a control channel occasion 630 may bein a different format than feedback information received during adownlink control channel occasion 610. For example, the PDCCH format(e.g., the format of the grant) for the control channel occasion 630 maybe different than the PDCCH format for the downlink control channeloccasion 610. In some examples, if a base station successfully decodesan uplink TB, the base station may transmit a subsequent grant in acontrol channel occasion 630. The grant may have a different format thanthe initial grant, and may inform the UE that the base station receivedthe TB and is reallocating the resources, such as one or more TTIs ofthe consecutive TTIs (possibly to a different UE). In some examples, thePDCCH format for the control channel occasion 630 may exclude resourceallocation information and/or a TB redundancy number (e.g., RVID), whichmay be included in the PDCCH format for the downlink control channeloccasion 610.

In some examples, a UE 115 may receive TB-level feedback within adownlink control channel occasion 610-b that occurs after the set ofaggregated slots 605. TB-level feedback may refer to feedback related toan entire TB; e.g., ACK/NACK feedback indicating whether a TB wassuccessfully received.

In some examples, feedback information received during a control channeloccasion 630 may include feedback that is at a finer level ofgranularity than TB-level granularity. For example, feedback informationreceived during a control channel occasion 630 may indicate whether aCBG within a TB or an individual CB within a TB was successfullyreceived. That is, the feedback may include CBG-level feedback and/orCB-level feedback. Such feedback may include, for example, an indexindicating to which CBG or CB within a TB the feedback applies. In somecases, such feedback may include a bit sequence indicating whether eachCBG or CB of the TB was successfully received. In some examples, a UE115 may, after receiving CB-level feedback or CBG-level feedback duringa control channel occasion 630, determine whether to retransmit a CB ora CBG in a subsequent slot of the aggregated slots 605 based on thefeedback.

FIG. 7 illustrates an example communication timeline 700 depicting atimeline for transmitting (e.g., by a UE 115) TBs in consecutive TTIs705 as part of a multi-TTI grant and receiving early feedback (e.g.,from a base station 105) during a feedback window 735. In some examples,communication timeline 700 may depict communications between a basestation (e.g., base station 105) and a UE (e.g., UE 115) as describedwith reference to FIGS. 1-2.

The UE 115 may transmit the TBs to the base station 105 during an uplinktransmission, such as a PUSCH transmission, for example. In someexamples, the multi-TTI grant may indicate multiple PUSCH transmissionsover multiple TTIs.

The consecutive TTIs 705 may be preceded by a first downlink controlchannel occasion 710-a and followed by a second downlink control channeloccasion 710-b. The downlink control channel occasions 710 may provideopportunities for the UE 115 to receive downlink control information(DCI) or feedback information from a base station 105 on PDCCHresources, for example. The consecutive TTIs 705 may be used forcommunication of data (e.g., in TBs) from UE 115 to base station 105. Insome cases, the UE 115 may transmit a different TB in each of theconsecutive TTIs 705.

Communication timeline 700 further includes control channel occasions730 interspersed within the slot aggregation duration 725 of theconsecutive TTIs 705. In some examples, control channel occasions 730may provide opportunities for the UE 115 to receive feedback informationfrom the base station 105 in the middle of the consecutive TTIs 705;e.g., before the second downlink control channel occasion 710-b. The UEmay monitor a control channel (e.g., PDCCH) during one or more controlchannel occasions 730, and may receive feedback information from thebase station 105 via the control channel (e.g., using PDCCH resources)during one or more control channel occasions 730. In some examples, thefeedback information may be received within an uplink grant from thebase station 105.

Communication timeline 700 includes feedback window 735, which may be aduration of time that begins at the start of the first control channeloccasion 730-a and finishes at the end of second downlink controlchannel occasion 710-b. Thus, feedback window 735 may be a window oftime during which a UE may monitor a downlink control channel (e.g.,PDCCH) for feedback during the control channel occasions 730 and duringthe second downlink control channel occasion 710-b. In some examples,feedback window 735 may be offset in time relative to the beginning TTIof the consecutive TTIs by offset 770.

In some examples, the UE 115 may receive (e.g., from a base station 105)an indication of the start of the feedback window 735 and/or a durationof the feedback window 735. The UE 115 may receive the indication of thestart of the feedback window and/or the duration of the feedback windowvia RRC signaling, for example, or as part of the multi-TTI grant.

In some examples, a UE 115 may transmit, to the base station 105, acapability indicator that indicates the UE 115 capabilities, asdescribed earlier with respect to FIG. 4. In some cases, the start ofthe feedback window 735 may be based on the UE 115 capabilities.

In some cases, an uplink grant (e.g., including feedback) receivedwithin the feedback window (e.g., received during a control channeloccasion 730) may be used to indicate ACK/NACK feedback at a finer levelof granularity (e.g., CB-level feedback or CBG-level feedback) for earlyTBs, while the multi-TTI uplink grant may not be able to providedetailed CBG-level feedback due to the overhead associated withmulti-TTI feedback indication. Thus, in some cases, a base station 105may transmit CBG-level feedback during one or more control channeloccasions 730 window for CBG-level indication/(re)transmission and maytransmit TB-level feedback during the second downlink control channeloccasion 715-a that occurs after the consecutive TTIs 705.

FIG. 8 illustrates an example of a process flow 800 in accordance withaspects of the present disclosure. In some cases, process flow 800 maybe implemented by aspects of wireless communications systems 100 or 200as described with reference to FIGS. 1 and 2. In some cases, processflow 800 may represent aspects of techniques performed by one or morereceivers or transmitters such as UEs 115 or base stations 105 describedwith respect to FIGS. 1-7.

At 815, a UE 810 may receive radio resource control (RRC) signaling froma base station 805. In some examples, the RRC signaling may include anindication of a feedback window. Optionally, for communication usingaggregated slots, the RRC signaling may include an indication of a slotaggregation duration.

At 820, UE 810 may optionally receive a grant of resources from basestation 805; e.g., for a multi-TTI grant. In some examples, the grantmay include an indication of a multi-TTI grant duration.

At 825, a UE 810 may receive a first TB in a first TTI. The first TTImay be a first slot of a set of aggregated slots (for slot aggregation),for example, or a first TTI of a set of consecutive TTIs (for multi-TTIgrants).

At 830, UE 810 may attempt to decode the TB received at 825.

At 835, UE 810 may transmit reduced feedback information to base station805. The reduced feedback information may include, for example, ACK/NACKfeedback based on whether the UE was able to successfully decode thefirst TB. Such feedback may include TB-level, CB-level, or CBG-levelfeedback for the first TB, or delta CSI information that indicates achange in CSI, or may indicate a number of additional TBs (e.g.,subsequent TBs with different redundancy versions) that UE 810 needs toreceive in order to successfully decode the TB.

At 840, base station 805 may determine, based on the reduced feedbacktransmitted by UE 810 at 835, whether to terminate transmission ofsubsequent TBs in the set of consecutive TTIs or schedule retransmissionof previously transmitted TBs in the set of consecutive TTIs, forexample.

Based on the determination at 840, base station 805 may transmit, at845, a second TB in a second TTI. The second TTI may be a first slot ofa set of aggregated slots (for slot aggregation), for example, or asecond TTI of a set of consecutive TTIs (for multi-TTI grants).

UE 810 may receive the second TB from base station 805 and, at 850, UE810 may attempt to decode the second TB.

At 855, UE 810 may transmit reduced feedback information to base station805. The reduced feedback information may include, for example, ACK/NACKfeedback based on whether the UE was able to successfully decode thefirst TB, the second TB, or both TBs, which may include TB-level,CB-level, or CBG-level feedback for the first or second TBs, or deltaCSI information that indicates a change in CSI, or an indication of anumber of additional TBs (e.g., subsequent TBs with different redundancyversions) that UE 810 needs to receive in order to successfully decodethe TB.

At 855, base station 805 may determine, based on the reduced feedbacktransmitted by UE 810 at 855, whether to terminate transmission ofsubsequent TBs in the set of consecutive TTIs or schedule retransmissionof previously transmitted TBs, CBs, or CBGs in a subsequent TTI of theset of consecutive TTIs, for example.

As indicated by the ellipses, in some cases, base station 805 maycontinue to transmit additional TBs in subsequent TTIs of the set ofconsecutive TTIs, up to and including the last TTI of the consecutiveTTIs. In some cases, base station 805 may terminate transmission earlyand may not transmit additional TBs.

At 865, which may occur after the last TTI of the set of consecutiveTTIs, UE 810 may transmit regular feedback to base station 805. Regularfeedback may include TB-level, CBG-level, and/or CB-level ACK/NACKfeedback for the TBs received from base station 805, CSI feedback, etc.

FIG. 9 shows a block diagram 900 of a device 905 in accordance withaspects of the present disclosure. The device 905 may be an example ofaspects of a UE 115 as described herein. The device 905 may include areceiver 910, a communications manager 915, and a transmitter 920. Thedevice 905 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 910 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to feedbackwindow for providing early feedback for transmissions in a set ofconsecutive transmission time intervals, etc.). Information may bepassed on to other components of the device 905. The receiver 910 may bean example of aspects of the transceiver 1220 described with referenceto FIG. 12. The receiver 910 may utilize a single antenna or a set ofantennas.

The communications manager 915 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,receive a transport block within a first TTI of the set of consecutiveTTIs, and transmit, within a first control channel occasion of the setof control channel occasions, feedback to indicate whether the transportblock was successfully received. The communications manager 915 may alsoreceive an indicator of a feedback window that is offset relative to abeginning TTI of a set of consecutive TTIs, the feedback windowincluding a set of control channel occasions interspersed within aduration of the set of consecutive TTIs, transmit a transport blockwithin a first TTI of the set of consecutive TTIs, and receive, within afirst control channel occasion of the set of control channel occasions,feedback indicating whether the transport block was successfullyreceived. The communications manager 915 may be an example of aspects ofthe communications manager 1210 described herein.

The device 905 or other devices described herein (e.g., a UE 115) mayprovide several advantages. For example, the device 905 may supportearly feedback that may enable more efficient signaling, better resourceutilization, and reduced retransmission latency, among other advantages.For example, if the device 905 successfully receives a TB, the device905 may not have to wait to transmit feedback (e.g., ACK feedback) untilafter the last TTI of the set of TTIs, which may enable better resourceutilization (e.g., the subsequent TTIs may be used for othercommunications rather than retransmission of a TB that has already beensuccessfully received). In some examples, if the device 905 does notsuccessfully receive a TB, the device may transmit early feedback (e.g.,NACK feedback) that may enable earlier retransmission of at least aportion of the TB in a subsequent TTI, thereby reducing retransmissionlatency.

The communications manager 915, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 915, or itssub-components may be executed by a general-purpose processor, a digitalsignal processor (DSP), an application-specific integrated circuit(ASIC), a field-programmable gate array (FPGA), or other programmablelogic device (PLD), discrete gate or transistor logic, discrete hardwarecomponents, or any combination thereof designed to perform the functionsdescribed in the present disclosure.

The communications manager 915, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 915, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 915, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 920 may transmit signals generated by other componentsof the device 905. In some examples, the transmitter 920 may becollocated with a receiver 910 in a transceiver module. For example, thetransmitter 920 may be an example of aspects of the transceiver 1220described with reference to FIG. 12. The transmitter 920 may utilize asingle antenna or a set of antennas.

FIG. 10 shows a block diagram 1000 of a device 1005 in accordance withaspects of the present disclosure. The device 1005 may be an example ofaspects of a device 905 or a UE 115 as described herein. The device 1005may include a receiver 1010, a communications manager 1015, and atransmitter 1030. The device 1005 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 1010 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to feedbackwindow for providing early feedback for transmissions in a set ofconsecutive transmission time intervals, etc.). Information may bepassed on to other components of the device 1005. The receiver 1010 maybe an example of aspects of the transceiver 1220 described withreference to FIG. 12. The receiver 1010 may utilize a single antenna ora set of antennas.

The communications manager 1015 may be an example of aspects of thecommunications manager 915 as described herein. The communicationsmanager 1015 may include a feedback component 1020 and a transport blockcomponent 1025. The communications manager 1015 may be an example ofaspects of the communications manager 1210 described herein.

The feedback component 1020 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIsand transmit, within a first control channel occasion of the set ofcontrol channel occasions, feedback to indicate whether the transportblock was successfully received.

The transport block component 1025 may receive a transport block withina first TTI of the set of consecutive TTIs.

The feedback component 1020 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIsand receive, within a first control channel occasion of the set ofcontrol channel occasions, feedback indicating whether the transportblock was successfully received.

The transport block component 1025 may transmit a transport block withina first TTI of the set of consecutive TTIs.

The transmitter 1030 may transmit signals generated by other componentsof the device 1005. In some examples, the transmitter 1030 may becollocated with a receiver 1010 in a transceiver module. For example,the transmitter 1030 may be an example of aspects of the transceiver1220 described with reference to FIG. 12. The transmitter 1030 mayutilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a communications manager 1105 inaccordance with aspects of the present disclosure. The communicationsmanager 1105 may be an example of aspects of a communications manager915, a communications manager 1015, or a communications manager 1210described herein. The communications manager 1105 may include a feedbackcomponent 1110, a transport block component 1115, a determinationcomponent 1120, a monitoring component 1125, a grant component 1130, acapability component 1135, a channel assessment component 1140, and ascheduling module 1145. Each of these modules may communicate, directlyor indirectly, with one another (e.g., via one or more buses).

The feedback component 1110 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs.

In some examples, the feedback component 1110 may transmit, within afirst control channel occasion of the set of control channel occasions,feedback to indicate whether the transport block was successfullyreceived.

In some examples, the feedback component 1110 may receive an indicatorof a feedback window that is offset relative to a beginning TTI of a setof consecutive TTIs, the feedback window including a set of controlchannel occasions interspersed within a duration of the set ofconsecutive TTIs.

In some examples, the feedback component 1110 may receive, within afirst control channel occasion of the set of control channel occasions,feedback indicating whether the transport block was successfullyreceived.

In some examples, the feedback component 1110 may transmit, within asecond control channel occasion of the set of control channel occasionsthat occurs after the first control channel occasion, an acknowledgmentto indicate successful receipt of the second transport block.

In some examples, the feedback component 1110 may transmit, within asecond control channel occasion of the set of control channel occasionsthat occurs after to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the second transportblock.

In some examples, the feedback component 1110 may receive a secondindicator that indicates the duration of the set of consecutive TTIs,where the set of consecutive TTIs is a set of aggregated TTIs.

In some examples, the feedback component 1110 may transmit delta channelstate information within the first control channel occasion.

In some examples, the feedback component 1110 may transmit, within asecond control channel occasion of the set of control channel occasionsthat occurs prior to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the transport blockin a second TTI that occurs prior to the first TTI.

In some examples, the feedback component 1110 may transmit, within acontrol channel of a TTI occurring after the set of consecutive TTIs,channel state information and second feedback.

In some examples, the feedback component 1110 may receive, within acontrol channel of a TTI occurring after the set of consecutive TTIs,transport block level feedback for at least one transport blocktransmitted within the set of consecutive TTIs.

In some cases, the feedback includes an acknowledgment to indicatesuccessful receipt of the transport block.

In some cases, the feedback indicates whether a set of transport blocksincluding the transport block were successfully received.

In some cases, the feedback includes a negative acknowledgment toindicate unsuccessful receipt of the transport block.

In some cases, the feedback includes code block group-level feedback orcode block-level feedback for the transport block.

The transport block component 1115 may receive a transport block withina first TTI of the set of consecutive TTIs.

In some examples, the transport block component 1115 may transmit atransport block within a first TTI of the set of consecutive TTIs.

In some examples, the transport block component 1115 may receive thesecond transport block in the second TTI.

In some examples, the transport block component 1115 may receive thetransport block in a subset of TTIs of the set of consecutive TTIs.

In some examples, the transport block component 1115 may receive asecond indicator that associates a respective redundancy version of aset of redundancy versions of the transport block with a respective TTIof the set of consecutive TTIs.

In some examples, the transport block component 1115 may transmit thetransport block in each TTI of the set of TTIs that occurs prior to thefirst control channel occasion.

In some examples, the transport block component 1115 may transmit asecond transport block in a second TTI of the set of consecutive TTIsthat occurs after the first control channel occasion based on thefeedback.

In some examples, the transport block component 1115 may transmit adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

The determination component 1120 may determine not to transmit thefeedback within any subsequent control channel occasion of the set ofcontrol channel occasions that occur after the first control channeloccasion.

In some examples, the determination component 1120 may determine not toretransmit the transport block in a subsequent TTI of the set ofconsecutive TTIs based on the feedback.

In some examples, the determination component 1120 may determine toretransmit, within a subsequent TTI of the consecutive set of TTIs, thetransport block based on the feedback.

In some examples, the determination component 1120 may determine toretransmit, within a subsequent TTI of the consecutive set of TTIs, atleast one code block or code block group of the transport block based onthe feedback.

The monitoring component 1125 may discontinue monitoring a second TTIthat occurs after the first TTI for the transport block based on thefeedback including an acknowledgment. In some examples, the monitoringcomponent 1125 may enable a wireless device (e.g., wireless device 905)to realize one or more potential advantages as described herein. Forexample, the monitoring component 1125 may enable wireless device 905 todiscontinue monitoring after providing early feedback, which may resultin beneficial power savings.

In some examples, the monitoring component 1125 may monitor a second TTIof the set of consecutive TTIs that occurs after the first TTI for asecond transport block.

In some examples, the monitoring component 1125 may monitor for adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.

The grant component 1130 may receive a grant indicating the beginningTTI of the set of consecutive TTIs and allocation of resources withineach TTI of the set of consecutive TTIs.

In some examples, the grant component 1130 may receive a grantindicating the beginning TTI of the set of consecutive TTIs andallocation of resources within each TTI of the set of consecutive TTIs.

The capability component 1135 may transmit a capability indicator to abase station, where a time period between the beginning TTI and a firstcontrol channel occasion of the plurality of control channel occasionsis based on the capability indicator.

In some examples, the capability component 1135 may transmit acapability indicator to a base station, where a time period between thebeginning TTI and a first control channel occasion of the plurality ofcontrol channel occasions is based on the capability indicator.

The channel assessment component 1140 may perform clear channelassessment on a shared radio frequency spectrum band prior totransmitting the feedback within the first control channel occasion.

The scheduling module 1145 may schedule to transmit at least twodifferent transport blocks in the set of consecutive TTIs.

FIG. 12 shows a diagram of a system 1200 including a device 1205 inaccordance with aspects of the present disclosure. The device 1205 maybe an example of or include the components of device 905, device 1005,or a UE 115 as described herein. The device 1205 may include componentsfor bi-directional voice and data communications including componentsfor transmitting and receiving communications, including acommunications manager 1210, an I/O controller 1215, a transceiver 1220,an antenna 1225, memory 1230, and a processor 1240. These components maybe in electronic communication via one or more buses (e.g., bus 1245).

The communications manager 1210 may receive an indicator of a feedbackwindow that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,transmit, within a first control channel occasion of the set of controlchannel occasions, feedback to indicate whether the transport block wassuccessfully received, and receive a transport block within a first TTIof the set of consecutive TTIs. The communications manager 1210 may alsoreceive an indicator of a feedback window that is offset relative to abeginning TTI of a set of consecutive TTIs, the feedback windowincluding a set of control channel occasions interspersed within aduration of the set of consecutive TTIs, receive, within a first controlchannel occasion of the set of control channel occasions, feedbackindicating whether the transport block was successfully received, andtransmit a transport block within a first TTI of the set of consecutiveTTIs.

The I/O controller 1215 may manage input and output signals for thedevice 1205. The I/O controller 1215 may also manage peripherals notintegrated into the device 1205. In some cases, the I/O controller 1215may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 1215 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 1215may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 1215may be implemented as part of a processor. In some cases, a user mayinteract with the device 1205 via the I/O controller 1215 or viahardware components controlled by the I/O controller 1215.

The transceiver 1220 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1220 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1220 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1225.However, in some cases the device may have more than one antenna 1225,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1230 may include random-access memory (RAM) and read-onlymemory (ROM). The memory 1230 may store computer-readable,computer-executable code 1235 including instructions that, whenexecuted, cause the processor to perform various functions describedherein. In some cases, the memory 1230 may contain, among other things,a basic input/output system (BIOS) which may control basic hardware orsoftware operation such as the interaction with peripheral components ordevices.

The processor 1240 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a PLD, a discrete gate or transistor logic component, a discretehardware component, or any combination thereof). In some cases, theprocessor 1240 may be configured to operate a memory array using amemory controller. In other cases, a memory controller may be integratedinto the processor 1240. The processor 1240 may be configured to executecomputer-readable instructions stored in a memory (e.g., the memory1230) to cause the device 1205 to perform various functions (e.g.,functions or tasks supporting feedback window for providing earlyfeedback for transmissions in a set of consecutive transmission timeintervals).

The code 1235 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1235 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1235 may not be directly executable by theprocessor 1240 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 13 shows a block diagram 1300 of a device 1305 in accordance withaspects of the present disclosure. The device 1305 may be an example ofaspects of a base station 105 as described herein. The device 1305 mayinclude a receiver 1310, a communications manager 1315, and atransmitter 1320. The device 1305 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 1310 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to feedbackwindow for providing early feedback for transmissions in a set ofconsecutive transmission time intervals, etc.). Information may bepassed on to other components of the device 1305. The receiver 1310 maybe an example of aspects of the transceiver 1620 described withreference to FIG. 16. The receiver 1310 may utilize a single antenna ora set of antennas.

The communications manager 1315 may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,receive a transport block within a first TTI of the set of consecutiveTTIs, and transmit, within a first control channel occasion of the setof control channel occasions, feedback indicating whether the transportblock was successfully received. The communications manager 1315 mayalso transmit, to a UE, an indicator of a feedback window that is offsetrelative to a beginning TTI of a set of consecutive TTIs, the feedbackwindow including a set of control channel occasions interspersed withina duration of the set of consecutive TTIs, transmit a transport blockwithin a first TTI of the set of consecutive TTIs, and receive, within afirst control channel occasion of the set of control channel occasions,feedback to indicate whether the transport block was successfullyreceived. The communications manager 1315 may be an example of aspectsof the communications manager 1610 described herein.

The communications manager 1315, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 1315, or itssub-components may be executed by a general-purpose processor, a DSP, anASIC, an FPGA or other PLD, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The communications manager 1315, or its sub-components, may bephysically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations by one or more physical components. In some examples, thecommunications manager 1315, or its sub-components, may be a separateand distinct component in accordance with various aspects of the presentdisclosure. In some examples, the communications manager 1315, or itssub-components, may be combined with one or more other hardwarecomponents, including but not limited to an input/output (I/O)component, a transceiver, a network server, another computing device,one or more other components described in the present disclosure, or acombination thereof in accordance with various aspects of the presentdisclosure.

The transmitter 1320 may transmit signals generated by other componentsof the device 1305. In some examples, the transmitter 1320 may becollocated with a receiver 1310 in a transceiver module. For example,the transmitter 1320 may be an example of aspects of the transceiver1620 described with reference to FIG. 16. The transmitter 1320 mayutilize a single antenna or a set of antennas.

FIG. 14 shows a block diagram 1400 of a device 1405 in accordance withaspects of the present disclosure. The device 1405 may be an example ofaspects of a device 1305 or a base station 105 as described herein. Thedevice 1405 may include a receiver 1410, a communications manager 1415,and a transmitter 1430. The device 1405 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 1410 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to feedbackwindow for providing early feedback for transmissions in a set ofconsecutive transmission time intervals, etc.). Information may bepassed on to other components of the device 1405. The receiver 1410 maybe an example of aspects of the transceiver 1620 described withreference to FIG. 16. The receiver 1410 may utilize a single antenna ora set of antennas.

The communications manager 1415 may be an example of aspects of thecommunications manager 1315 as described herein. The communicationsmanager 1415 may include a feedback component 1420 and a transport blockcomponent 1425. The communications manager 1415 may be an example ofaspects of the communications manager 1610 described herein.

The feedback component 1420 may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIsand transmit, within a first control channel occasion of the set ofcontrol channel occasions, feedback indicating whether the transportblock was successfully received.

The transport block component 1425 may receive a transport block withina first TTI of the set of consecutive TTIs.

The feedback component 1420 may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIsand receive, within a first control channel occasion of the set ofcontrol channel occasions, feedback to indicate whether the transportblock was successfully received.

The transport block component 1425 may transmit a transport block withina first TTI of the set of consecutive TTIs.

The transmitter 1430 may transmit signals generated by other componentsof the device 1405. In some examples, the transmitter 1430 may becollocated with a receiver 1410 in a transceiver module. For example,the transmitter 1430 may be an example of aspects of the transceiver1620 described with reference to FIG. 16. The transmitter 1430 mayutilize a single antenna or a set of antennas.

FIG. 15 shows a block diagram 1500 of a communications manager 1505 inaccordance with aspects of the present disclosure. The communicationsmanager 1505 may be an example of aspects of a communications manager1315, a communications manager 1415, or a communications manager 1610described herein. The communications manager 1505 may include a feedbackcomponent 1510, a transport block component 1515, a grant component1520, a decoding component 1525, a capability component 1530, and amonitoring component 1535. Each of these modules may communicate,directly or indirectly, with one another (e.g., via one or more buses).

The feedback component 1510 may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs.

In some examples, the feedback component 1510 may transmit, within afirst control channel occasion of the set of control channel occasions,feedback indicating whether the transport block was successfullyreceived. In some examples, the feedback component 1510 may transmit, toa UE, an indicator of a feedback window that is offset relative to abeginning TTI of a set of consecutive TTIs, the feedback windowincluding a set of control channel occasions interspersed within aduration of the set of consecutive TTIs.

In some examples, the feedback component 1510 may receive, within afirst control channel occasion of the set of control channel occasions,feedback to indicate whether the transport block was successfullyreceived.

In some examples, the feedback component 1510 may transmit, within acontrol channel of a TTI occurring after the set of consecutive TTIs,transport block level feedback for at least one transport blocktransmitted within the set of consecutive TTIs.

In some examples, the feedback component 1510 may receive delta channelstate information within the first control channel occasion.

In some examples, the feedback component 1510 may receive, within asecond control channel occasion of the set of control channel occasionsthat occurs prior to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the transport blockin a second TTI that occurs prior to the first TTI.

In some examples, the feedback component 1510 may receive, within asecond control channel occasion of the set of control channel occasions,a second feedback to indicate whether the second transport block wassuccessfully received.

In some examples, the feedback component 1510 may receive, within acontrol channel of a TTI occurring after the set of consecutive TTIs,channel state information feedback and second feedback.

In some cases, the feedback indicates whether a code block or code blockgroup of the transport block was successfully received. In some cases,the feedback includes code block group-level feedback or codeblock-level feedback for the transport block.

In some cases, the feedback includes an acknowledgment to indicatesuccessful receipt of the transport block. In some cases, the feedbackincludes a negative acknowledgment to indicate unsuccessful receipt ofthe transport block.

The transport block component 1515 may receive a transport block withina first TTI of the set of consecutive TTIs.

In some examples, the transport block component 1515 may transmit atransport block within a first TTI of the set of consecutive TTIs. Insome examples, the transport block component 1515 may receive a secondtransport block in a second TTI of the set of consecutive TTIs thatoccurs after the first TTI.

In some examples, the transport block component 1515 may transmit asecond indicator that indicates the duration of the set of consecutiveTTIs, where the set of consecutive TTIs is a set of aggregated TTIs. Insome examples, the transport block component 1515 may receive adifferent redundancy version of the transport block in a subset of TTIsof the set of consecutive TTIs.

In some examples, the transport block component 1515 may transmit asecond transport block in a second TTI of the set of consecutive TTIsthat occurs after the first TTI based on the feedback including anacknowledgement. In some examples, the transport block component 1515may transmit a second indicator that associates a respective redundancyversion of a set of redundancy versions of the transport block with arespective TTI of the set of TTIs. In some examples, the transport blockcomponent 1515 may transmit a different redundancy version of thetransport block in at least two TTIs of the set of consecutive TTIs.

The grant component 1520 may transmit a grant that includes thefeedback, where the grant indicates to terminate transmission of thetransport block in at least one TTI of the set of consecutive TTIs thatoccurs after the first control channel occasion. In some examples, thegrant component 1520 may transmit a grant indicating the beginning TTIof the set of consecutive TTIs and allocation of resources within eachTTI of the set of consecutive TTIs. In some examples, the grantcomponent 1520 may transmit, to the UE, a grant indicating reallocationof at least one TTI of the set of consecutive TTIs that occurs after thefirst control channel occasion. In some examples, the grant component1520 may receive a grant indicating the beginning TTI of the set ofconsecutive TTIs and allocation of resources within each TTI of the setof consecutive TTIs.

The decoding component 1525 may attempt to decode the transport block ineach TTI of the set of TTIs that occurs prior to the first controlchannel occasion.

The capability component 1530 may receive a capability indicator, wherea time period between the beginning TTI and a first control channeloccasion of the plurality of control channel occasions is based on thecapability indicator.

The monitoring component 1535 may monitor for a different redundancyversion of the transport block in at least two TTIs of the set ofconsecutive TTIs.

FIG. 16 shows a diagram of a system 1600 including a device 1605 inaccordance with aspects of the present disclosure. The device 1605 maybe an example of or include the components of device 1305, device 1405,or a base station 105 as described herein. The device 1605 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 1610, a network communications manager 1615, atransceiver 1620, an antenna 1625, memory 1630, a processor 1640, and aninter-station communications manager 1645. These components may be inelectronic communication via one or more buses (e.g., bus 1650).

The communications manager 1610 may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs,transmit, within a first control channel occasion of the set of controlchannel occasions, feedback indicating whether the transport block wassuccessfully received, and receive a transport block within a first TTIof the set of consecutive TTIs. The communications manager 1610 may alsotransmit, to a UE, an indicator of a feedback window that is offsetrelative to a beginning TTI of a set of consecutive TTIs, the feedbackwindow including a set of control channel occasions interspersed withina duration of the set of consecutive TTIs, receive, within a firstcontrol channel occasion of the set of control channel occasions,feedback to indicate whether the transport block was successfullyreceived, and transmit a transport block within a first TTI of the setof consecutive TTIs.

The network communications manager 1615 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1615 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1620 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1620 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1620 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1625.However, in some cases the device may have more than one antenna 1625,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1630 may include RAM, ROM, or a combination thereof. Thememory 1630 may store computer-readable code 1635 including instructionsthat, when executed by a processor (e.g., the processor 1640) cause thedevice to perform various functions described herein. In some cases, thememory 1630 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1640 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a PLD, a discrete gate or transistor logic component, a discretehardware component, or any combination thereof). In some cases, theprocessor 1640 may be configured to operate a memory array using amemory controller. In some cases, a memory controller may be integratedinto processor 1640. The processor 1640 may be configured to executecomputer-readable instructions stored in a memory (e.g., the memory1630) to cause the device to perform various functions (e.g., functionsor tasks supporting feedback window for providing early feedback fortransmissions in a set of consecutive transmission time intervals).

The inter-station communications manager 1645 may manage communicationswith other base station 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1645 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1645 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1635 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1635 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1635 may not be directly executable by theprocessor 1640 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 17 shows a flowchart illustrating a method 1700 in accordance withaspects of the present disclosure. The operations of method 1700 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1700 may be performed by acommunications manager as described with reference to FIGS. 9 through12. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedbelow. Additionally or alternatively, a UE may perform aspects of thefunctions described below using special-purpose hardware.

At 1705, the UE may receive an indicator of a feedback window that isoffset relative to a beginning TTI of a set of consecutive TTIs, thefeedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs. Theoperations of 1705 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1705 may beperformed by a Feedback Component as described with reference to FIGS. 9through 12.

At 1710, the UE may receive a transport block within a first TTI of theset of consecutive TTIs. The operations of 1710 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1710 may be performed by a Transport Block Componentas described with reference to FIGS. 9 through 12.

At 1715, the UE may transmit, within a first control channel occasion ofthe set of control channel occasions, feedback to indicate whether thetransport block was successfully received. The operations of 1715 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1715 may be performed by a FeedbackComponent as described with reference to FIGS. 9 through 12.

FIG. 18 shows a flowchart illustrating a method 1800 in accordance withaspects of the present disclosure. The operations of method 1800 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1800 may be performed by acommunications manager as described with reference to FIGS. 9 through12. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedbelow. Additionally or alternatively, a UE may perform aspects of thefunctions described below using special-purpose hardware.

At 1805, the UE may receive an indicator of a feedback window that isoffset relative to a beginning TTI of a set of consecutive TTIs, thefeedback window including a set of control channel occasionsinterspersed within a duration of the set of consecutive TTIs. Theoperations of 1805 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1805 may beperformed by a Feedback Component as described with reference to FIGS. 9through 12.

At 1810, the UE may transmit a transport block within a first TTI of theset of consecutive TTIs. The operations of 1810 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1810 may be performed by a Transport Block Componentas described with reference to FIGS. 9 through 12.

At 1815, the UE may receive, within a first control channel occasion ofthe set of control channel occasions, feedback indicating whether thetransport block was successfully received. The operations of 1815 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1815 may be performed by a FeedbackComponent as described with reference to FIGS. 9 through 12.

FIG. 19 shows a flowchart illustrating a method 1900 in accordance withaspects of the present disclosure. The operations of method 1900 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 1900 may be performed by acommunications manager as described with reference to FIGS. 13 through16. In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described below. Additionally or alternatively, a base stationmay perform aspects of the functions described below usingspecial-purpose hardware.

At 1905, the base station may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs.The operations of 1905 may be performed according to the methodsdescribed herein. In some examples, aspects of the operations of 1905may be performed by a Feedback Component as described with reference toFIGS. 13 through 16.

At 1910, the base station may receive a transport block within a firstTTI of the set of consecutive TTIs. The operations of 1910 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1910 may be performed by a Transport BlockComponent as described with reference to FIGS. 13 through 16.

At 1915, the base station may transmit, within a first control channeloccasion of the set of control channel occasions, feedback indicatingwhether the transport block was successfully received. The operations of1915 may be performed according to the methods described herein. In someexamples, aspects of the operations of 1915 may be performed by aFeedback Component as described with reference to FIGS. 13 through 16.

FIG. 20 shows a flowchart illustrating a method 2000 in accordance withaspects of the present disclosure. The operations of method 2000 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 2000 may be performed by acommunications manager as described with reference to FIGS. 13 through16. In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described below. Additionally or alternatively, a base stationmay perform aspects of the functions described below usingspecial-purpose hardware.

At 2005, the base station may transmit, to a UE, an indicator of afeedback window that is offset relative to a beginning TTI of a set ofconsecutive TTIs, the feedback window including a set of control channeloccasions interspersed within a duration of the set of consecutive TTIs.The operations of 2005 may be performed according to the methodsdescribed herein. In some examples, aspects of the operations of 2005may be performed by a Feedback Component as described with reference toFIGS. 13 through 16.

At 2010, the base station may transmit a transport block within a firstTTI of the set of consecutive TTIs. The operations of 2010 may beperformed according to the methods described herein. In some examples,aspects of the operations of 2010 may be performed by a Transport BlockComponent as described with reference to FIGS. 13 through 16.

At 2015, the base station may receive, within a first control channeloccasion of the set of control channel occasions, feedback to indicatewhether the transport block was successfully received. The operations of2015 may be performed according to the methods described herein. In someexamples, aspects of the operations of 2015 may be performed by aFeedback Component as described with reference to FIGS. 13 through 16.

It should be noted that the methods described above describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wirelesscommunications systems such as code division multiple access (CDMA),time division multiple access (TDMA), frequency division multiple access(FDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and other systems.A CDMA system may implement a radio technology such as CDMA2000,Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000,IS-95, and IS-856 standards. IS-2000 Releases may be commonly referredto as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to asCDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. A TDMA system mayimplement a radio technology such as Global System for MobileCommunications (GSM).

An OFDMA system may implement a radio technology such as Ultra MobileBroadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical andElectronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal MobileTelecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releasesof UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR,and GSM are described in documents from the organization named “3rdGeneration Partnership Project” (3GPP). CDMA2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). The techniques described herein may be used for thesystems and radio technologies mentioned above as well as other systemsand radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NRsystem may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, thetechniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro,or NR applications.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEs115 with service subscriptions with the network provider. A small cellmay be associated with a lower-powered base station 105, as comparedwith a macro cell, and a small cell may operate in the same or different(e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Smallcells may include pico cells, femto cells, and micro cells according tovarious examples. A pico cell, for example, may cover a small geographicarea and may allow unrestricted access by UEs 115 with servicesubscriptions with the network provider. A femto cell may also cover asmall geographic area (e.g., a home) and may provide restricted accessby UEs 115 having an association with the femto cell (e.g., UEs 115 in aclosed subscriber group (CSG), UEs 115 for users in the home, and thelike). An eNB for a macro cell may be referred to as a macro eNB. An eNBfor a small cell may be referred to as a small cell eNB, a pico eNB, afemto eNB, or a home eNB. An eNB may support one or multiple (e.g., two,three, four, and the like) cells, and may also support communicationsusing one or multiple component carriers.

The wireless communications system 100 or systems described herein maysupport synchronous or asynchronous operation. For synchronousoperation, the base stations 105 may have similar frame timing, andtransmissions from different base stations 105 may be approximatelyaligned in time. For asynchronous operation, the base stations 105 mayhave different frame timing, and transmissions from different basestations 105 may not be aligned in time. The techniques described hereinmay be used for either synchronous or asynchronous operations.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the above description may berepresented by voltages, currents, electromagnetic waves, magneticfields or particles, optical fields or particles, or any combinationthereof.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, an FPGA, or other PLD,discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices (e.g., a combinationof a DSP and a microprocessor, multiple microprocessors, one or moremicroprocessors in conjunction with a DSP core, or any other suchconfiguration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described above can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable read only memory(EEPROM), flash memory, compact disk (CD) ROM or other optical diskstorage, magnetic disk storage or other magnetic storage devices, or anyother non-transitory medium that can be used to carry or store desiredprogram code means in the form of instructions or data structures andthat can be accessed by a general-purpose or special-purpose computer,or a general-purpose or special-purpose processor. Also, any connectionis properly termed a computer-readable medium. For example, if thesoftware is transmitted from a website, server, or other remote sourceusing a coaxial cable, fiber optic cable, twisted pair, digitalsubscriber line (DSL), or wireless technologies such as infrared, radio,and microwave, then the coaxial cable, fiber optic cable, twisted pair,DSL, or wireless technologies such as infrared, radio, and microwave areincluded in the definition of medium. Disk and disc, as used herein,include CD, laser disc, optical disc, digital versatile disc (DVD),floppy disk and Blu-ray disc where disks usually reproduce datamagnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an exemplary step that is described as “based on conditionA” may be based on both a condition A and a condition B withoutdeparting from the scope of the present disclosure. In other words, asused herein, the phrase “based on” shall be construed in the same manneras the phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “exemplary” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, well-known structures and devices are shownin block diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notlimited to the examples and designs described herein, but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

What is claimed is:
 1. A method for wireless communication by a basestation, comprising: transmitting, to a user equipment (UE), anindicator of a feedback window that is offset relative to a beginningtransmission time interval (TTI) of a set of consecutive TTIs, thefeedback window comprising a plurality of control channel occasionsinterspersed within a duration of the set of consecutive TTIs; receivinga transport block within a first TTI of the set of consecutive TTIs; andtransmitting, within a first control channel occasion of the pluralityof control channel occasions, feedback indicating whether the transportblock was successfully received.
 2. The method of claim 1, whereintransmitting the feedback further comprises: transmitting a grant thatcomprises the feedback, wherein the grant indicates to terminatetransmission of the transport block in at least one TTI of the set ofconsecutive TTIs that occurs after the first control channel occasion.3. The method of claim 1, wherein the feedback indicates whether a codeblock or code block group of the transport block was successfullyreceived.
 4. The method of claim 1, further comprising: attempting todecode the transport block in each TTI of the set of consecutive TTIsthat occurs prior to the first control channel occasion.
 5. The methodof claim 1, further comprising: transmitting a grant indicating thebeginning TTI of the set of consecutive TTIs and allocation of resourceswithin each TTI of the set of consecutive TTIs.
 6. The method of claim5, further comprising: receiving a capability indicator, wherein a timeperiod between the beginning TTI and the first control channel occasionof the plurality of control channel occasions is based at least in parton the capability indicator.
 7. The method of claim 1, furthercomprising: receiving a second transport block in a second TTI of theset of consecutive TTIs that occurs after the first TTI.
 8. The methodof claim 1, further comprising: transmitting, within a control channelof a TTI occurring after the set of consecutive TTIs, transport blocklevel feedback for at least one transport block transmitted within theset of consecutive TTIs.
 9. The method of claim 1, wherein the feedbackcomprises code block group-level feedback or code block-level feedbackfor the transport block.
 10. The method of claim 1, further comprising:monitoring for a different redundancy version of the transport block inat least two TTIs of the set of consecutive TTIs.
 11. A method forwireless communication by a base station, comprising: transmitting, to auser equipment (UE), an indicator of a feedback window that is offsetrelative to a beginning transmission time interval (TTI) of a set ofconsecutive TTIs, the feedback window comprising a plurality of controlchannel occasions interspersed within a duration of the set ofconsecutive TTIs; transmitting a transport block within a first TTI ofthe set of consecutive TTIs; and receiving, within a first controlchannel occasion of the plurality of control channel occasions, feedbackto indicate whether the transport block was successfully received. 12.The method of claim 11, further comprising: transmitting a secondindicator that indicates the duration of the set of consecutive TTIs,wherein the set of consecutive TTIs is a set of aggregated TTIs.
 13. Themethod of claim 11, wherein the feedback comprises an acknowledgment toindicate successful receipt of the transport block.
 14. The method ofclaim 11, further comprising: transmitting, to the UE, a grantindicating reallocation of at least one TTI of the set of consecutiveTTIs that occurs after the first control channel occasion.
 15. Themethod of claim 11, wherein the feedback comprises a negativeacknowledgment to indicate unsuccessful receipt of the transport block.16. The method of claim 15, further comprising: receiving delta channelstate information within the first control channel occasion.
 17. Themethod of claim 11, further comprising: receiving, within a secondcontrol channel occasion of the plurality of control channel occasionsthat occurs prior to the first control channel occasion, a negativeacknowledgment to indicate unsuccessful receipt of the transport blockin a second TTI that occurs prior to the first TTI.
 18. The method ofclaim 11, further comprising: receiving a grant indicating the beginningTTI of the set of consecutive TTIs and allocation of resources withineach TTI of the set of consecutive TTIs.
 19. The method of claim 11,further comprising: receiving a different redundancy version of thetransport block in a subset of TTIs of the set of consecutive TTIs. 20.The method of claim 11, further comprising: transmitting a secondtransport block in a second TTI of the set of consecutive TTIs thatoccurs after the first TTI based at least in part on the feedbackcomprising an acknowledgement.
 21. The method of claim 20, furthercomprising: receiving, within a second control channel occasion of theplurality of control channel occasions, a second feedback to indicatewhether the second transport block was successfully received.
 22. Themethod of claim 11, further comprising: receiving, within a controlchannel of a TTI occurring after the set of consecutive TTIs, channelstate information feedback and second feedback.
 23. The method of claim11, further comprising: transmitting a second indicator that associatesa respective redundancy version of a plurality of redundancy versions ofthe transport block with a respective TTI of the set of consecutiveTTIs.
 24. The method of claim 11, further comprising: transmitting adifferent redundancy version of the transport block in at least two TTIsof the set of consecutive TTIs.
 25. An apparatus for wirelesscommunication by a base station, comprising: a receiver; a transmitter;a processor; memory in electronic communication with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to: transmit, via the transmitter and to a userequipment (UE), an indicator of a feedback window that is offsetrelative to a beginning transmission time interval (TTI) of a set ofconsecutive TTIs, the feedback window comprising a plurality of controlchannel occasions interspersed within a duration of the set ofconsecutive TTIs; receive, via the receiver, a transport block within afirst TTI of the set of consecutive TTIs; and transmit, via thetransmitter and within a first control channel occasion of the pluralityof control channel occasions, feedback indicating whether the transportblock was successfully received.
 26. The apparatus of claim 25, whereinthe instructions to transmit the feedback further are executable by theprocessor to cause the apparatus to: transmit a grant that comprises thefeedback, wherein the grant indicates to terminate transmission of thetransport block in at least one TTI of the set of consecutive TTIs thatoccurs after the first control channel occasion.
 27. The apparatus ofclaim 25, wherein the feedback indicates whether a code block or codeblock group of the transport block was successfully received.
 28. Anapparatus for wireless communication by a base station, comprising:means for transmitting, to a user equipment (UE), an indicator of afeedback window that is offset relative to a beginning transmission timeinterval (TTI) of a set of consecutive TTIs, the feedback windowcomprising a plurality of control channel occasions interspersed withina duration of the set of consecutive TTIs; means for receiving atransport block within a first TTI of the set of consecutive TTIs; andmeans for transmitting, within a first control channel occasion of theplurality of control channel occasions, feedback indicating whether thetransport block was successfully received.
 29. The apparatus of claim28, wherein the means for transmitting the feedback further comprises:means for transmitting a grant that comprises the feedback, wherein thegrant indicates to terminate transmission of the transport block in atleast one TTI of the set of consecutive TTIs that occurs after the firstcontrol channel occasion.
 30. The apparatus of claim 28, wherein thefeedback indicates whether a code block or code block group of thetransport block was successfully received.